Note that it wont appear in that addon list.txt because that's for server sided mods and not client sided.
Good point, here is console.log with client addons:
--------- Loading Client Add-Ons ---------
Executing base/server/crapOns_Cache.cs.
Client checking Add-On: Vehicle_Train_Box
Loading Add-On: Vehicle_Train_Box (CRC:-1611289180)
Executing Add-Ons/Vehicle_Train_Box/client.cs.
Client checking Add-On: Tool_Multitool
Loading Add-On: Tool_Multitool (CRC:-261410703)
Executing Add-Ons/Tool_Multitool/client.cs.
Client checking Add-On: System_ReturnToBlockland
Loading Add-On: System_ReturnToBlockland (CRC:1606352572)
Executing Add-Ons/System_ReturnToBlockland/client.cs.
Executing config/client/rtb/prefs.cs.
Executing config/server/ADD_ON_LIST.cs.
Executing Add-Ons/System_ReturnToBlockland/RTBC_Profiles.cs.
Executing Add-Ons/System_ReturnToBlockland/RTBH_Support.cs.
Activating package: RTBH_Support
Executing Add-Ons/System_ReturnToBlockland/RTBC_Authentication.cs.
Activating package: RTBC_Authentication
Executing Add-Ons/System_ReturnToBlockland/RTBC_ColorManager.cs.
Executing Add-Ons/System_ReturnToBlockland/RTB_ColorManager.gui.
Executing Add-Ons/System_ReturnToBlockland/RTBC_GUITransfer.cs.
Activating package: RTBC_GUITransfer
Executing Add-Ons/System_ReturnToBlockland/RTBC_InfoTips.cs.
Executing Add-Ons/System_ReturnToBlockland/RTBR_InfoTips_Hook.cs.
Activating package: RTBC_InfoTips
Executing Add-Ons/System_ReturnToBlockland/RTBC_IRCClient.cs.
Executing Add-Ons/System_ReturnToBlockland/RTB_IRCClient.gui.
Activating package: RTBC_IRCClient
Executing Add-Ons/System_ReturnToBlockland/RTBC_Manual.cs.
Executing Add-Ons/System_ReturnToBlockland/RTB_Manual.gui.
Executing Add-Ons/System_ReturnToBlockland/RTBC_ModManager.cs.
Executing Add-Ons/System_ReturnToBlockland/RTB_ModManager.gui.
Executing Add-Ons/System_ReturnToBlockland/RTB_ModUpdates.gui.
Activating package: RTBC_ModManager
Executing Add-Ons/System_ReturnToBlockland/RTBC_Options.cs.
Executing Add-Ons/System_ReturnToBlockland/RTB_Options.gui.
Executing Add-Ons/System_ReturnToBlockland/RTBC_ServerControl.cs.
Executing Add-Ons/System_ReturnToBlockland/RTB_ServerControl.gui.
Activating package: RTBC_ServerControl
Executing Add-Ons/System_ReturnToBlockland/RTBC_ServerInformation.cs.
Executing Add-Ons/System_ReturnToBlockland/RTB_ServerInformation.gui.
Activating package: RTBC_ServerInformation
Executing Add-Ons/System_ReturnToBlockland/RTBC_Updater.cs.
Executing Add-Ons/System_ReturnToBlockland/RTB_Updater.gui.
Executing Add-Ons/System_ReturnToBlockland/BL_AddOnsGui.gui.
Executing Add-Ons/System_ReturnToBlockland/BL_JoinServerGui.gui.
Activating package: RTB_Client
Client checking Add-On: System_LoadAddOn
Loading Add-On: System_LoadAddOn (CRC:1967009922)
Executing Add-Ons/System_LoadAddOn/client.cs.
Executing Add-Ons/System_LoadAddOn/LoadAddOn.gui.
Activating package: LoadAddOn_ClientPack
Client checking Add-On: Support_clCmd
Loading Add-On: Support_clCmd (CRC:-1767971528)
Executing Add-Ons/Support_clCmd/client.cs.
Activating package: clCmd
Client checking Add-On: Server_ReserveSlots
Loading Add-On: Server_ReserveSlots (CRC:2007273248)
Executing Add-Ons/Server_ReserveSlots/client.cs.
Executing Add-Ons/Server_ReserveSlots/ReserveGUI.gui.
Activating package: ReserveClient
Client checking Add-On: Server_BrickTime
Loading Add-On: Server_BrickTime (CRC:-1824231955)
Executing Add-Ons/Server_BrickTime/client.cs.
Activating package: BrickUpdateTimeClient
Client checking Add-On: Script_ToolBinds
Loading Add-On: Script_ToolBinds (CRC:1195138462)
Executing Add-Ons/Script_ToolBinds/client.cs.
Client checking Add-On: Script_Tetris
Loading Add-On: Script_Tetris (CRC:-1410340490)
Executing Add-Ons/Script_Tetris/client.cs.
Executing Add-Ons/Script_Tetris/tetrisgui.gui.
Activating package: tetris
Client checking Add-On: Script_ServerSwitch
Loading Add-On: Script_ServerSwitch (CRC:-590443457)
Executing Add-Ons/Script_ServerSwitch/client.cs.
Activating package: ServerSwitch
Client checking Add-On: Script_rtbInGame
Loading Add-On: Script_rtbInGame (CRC:1736759569)
Executing Add-Ons/Script_rtbInGame/client.cs.
Client checking Add-On: Script_Redo
Loading Add-On: Script_Redo (CRC:697821221)
Executing Add-Ons/Script_Redo/client.cs.
Client checking Add-On: Script_Notify
Loading Add-On: Script_Notify (CRC:-661188649)
Executing Add-Ons/Script_Notify/client.cs.
Executing Add-Ons/Script_Notify/IRC_Notify.gui.
Executing Add-Ons/Script_Notify/IRC.cs.
Executing Config/Client/Functions/Notify.cs.
Activating package: IRCNotifier
Client checking Add-On: Script_MacroSaver
Loading Add-On: Script_MacroSaver (CRC:-1850919998)
Executing Add-Ons/Script_MacroSaver/client.cs.
Executing Add-Ons/Script_MacroSaver/macroGui.gui.
Activating package: MacroSaver
Client checking Add-On: Script_LSG
Loading Add-On: Script_LSG (CRC:355546926)
Executing Add-Ons/Script_LSG/client.cs.
Executing Add-Ons/Script_LSG/LSG_Gui.gui.
Executing Add-Ons/Script_LSG/LSGPreviewGui.gui.
Executing Add-Ons/Script_LSG/LSGCGui.gui.
Executing Add-Ons/Script_LSG/LSG_searchfile.gui.
Executing Add-Ons/Script_LSG/Support_DataMan.cs.
Executing Add-Ons/Script_LSG/script_LSG.cs.
Client checking Add-On: Script_LoadSearch
Loading Add-On: Script_LoadSearch (CRC:-1573997042)
Executing Add-Ons/Script_LoadSearch/client.cs.
Client checking Add-On: Script_HealthBar
Loading Add-On: Script_HealthBar (CRC:-604382600)
Executing Add-Ons/Script_HealthBar/client.cs.
Executing Add-Ons/Script_HealthBar/HealthBar.gui.
Activating package: Healthbar_Client
Client checking Add-On: script_GreekBots
Add-On is in the list of known bad add-on CRCs - will not execute
Client checking Add-On: Script_GetHex
Loading Add-On: Script_GetHex (CRC:1701327579)
Executing Add-Ons/Script_GetHex/client.cs.
Activating package: ClientGetHex
Client checking Add-On: Script_Copy
Loading Add-On: Script_Copy (CRC:722715826)
Executing Add-Ons/Script_Copy/client.cs.
Executing Add-Ons/Script_Copy/CopyModGui.gui.
Client checking Add-On: Script_Compass
Loading Add-On: Script_Compass (CRC:-1793274708)
Executing Add-Ons/Script_Compass/client.cs.
Add-Ons/Script_Compass/client.cs (0): Unable to find function Compass_ExteriorInit
Activating package: CompassClient
Client checking Add-On: Script_ClientWatch
Loading Add-On: Script_ClientWatch (CRC:-2027569966)
Executing Add-Ons/Script_ClientWatch/client.cs.
Activating package: watchy
Client checking Add-On: Script_ClientSpy
Loading Add-On: Script_ClientSpy (CRC:-673752590)
Executing Add-Ons/Script_ClientSpy/client.cs.
Activating package: ClientSpy
Client checking Add-On: Script_ClientOrb
Loading Add-On: Script_ClientOrb (CRC:2113575690)
Executing Add-Ons/Script_ClientOrb/client.cs.
Client checking Add-On: Script_ClientAim
Loading Add-On: Script_ClientAim (CRC:-459795771)
Executing Add-Ons/Script_ClientAim/client.cs.
Client checking Add-On: Script_BuildChar
Loading Add-On: Script_BuildChar (CRC:1352738544)
Executing Add-Ons/Script_BuildChar/client.cs.
Activating package: buildChar
Client checking Add-On: Script_AutoWrench
Loading Add-On: Script_AutoWrench (CRC:819968124)
Executing Add-Ons/Script_AutoWrench/client.cs.
Activating package: autoEvents
Client checking Add-On: Script_Auto-Jet
Loading Add-On: Script_Auto-Jet (CRC:-700391062)
Executing Add-Ons/Script_Auto-Jet/client.cs.
Activating package: autoJetPackage
Client checking Add-On: Script_achievements
Loading Add-On: Script_achievements (CRC:-1170657415)
Executing Add-Ons/Script_achievements/client.cs.
Executing Add-Ons/Script_achievements/Profiles.cs.
Executing Add-Ons/Script_achievements/AchGUI.gui.
Client checking Add-On: Player_ArmyManSoldier
Add-On is in the list of known bad add-on CRCs - will not execute
Client checking Add-On: GUI_WCityGen
Loading Add-On: GUI_WCityGen (CRC:563626990)
Executing Add-Ons/GUI_WCityGen/client.cs.
Executing Add-Ons/GUI_WCityGen/wrenchDetailFlagsDlg.gui.
Client checking Add-On: GUI_TabShiftingBrickSelector
Loading Add-On: GUI_TabShiftingBrickSelector (CRC:1461943127)
Executing Add-Ons/GUI_TabShiftingBrickSelector/client.cs.
Executing Add-Ons/GUI_TabShiftingBrickSelector/ui/BrickSelectorDlg.gui.
Activating package: GUI_tabShiftingBrickSelectorC
lient
Client checking Add-On: GUI_AdminGuiEdit
Loading Add-On: GUI_AdminGuiEdit (CRC:-666218458)
Executing Add-Ons/GUI_AdminGuiEdit/client.cs.
Client checking Add-On: Gamemode_zombie
Loading Add-On: Gamemode_zombie (CRC:-668635940)
Executing Add-Ons/Gamemode_zombie/client.cs.
Executing Add-Ons/Gamemode_zombie/NewZMG.gui.
Executing Add-Ons/Gamemode_zombie/Zombieclient.cs.
Activating package: MinigameZombieGuiAddPackage
Client checking Add-On: GameMode_ZAPT
Loading Add-On: GameMode_ZAPT (CRC:-1149249672)
Executing Add-Ons/GameMode_ZAPT/client.cs.
Activating package: ZAPT_Client
Client checking Add-On: Gamemode_TeamDeathmatch
Loading Add-On: Gamemode_TeamDeathmatch (CRC:-943163763)
Executing Add-Ons/Gamemode_TeamDeathmatch/client.cs.
Executing Add-Ons/Gamemode_TeamDeathmatch/MinigameGUI.cs.
Executing Add-Ons/Gamemode_TeamDeathmatch/MinigameGUI_TeamEdit.gui.
Executing Add-Ons/Gamemode_TeamDeathmatch/MinigameGUI_Teams.gui.
Executing Add-Ons/Gamemode_TeamDeathmatch/MinigameGUI_Rules.gui.
Activating package: MinigameGUIClient
Client checking Add-On: FloodMod_FloodGUI
Loading Add-On: FloodMod_FloodGUI (CRC:1282064320)
Executing Add-Ons/FloodMod_FloodGUI/client.cs.
Executing Add-Ons/FloodMod_FloodGUI/FloodGui.gui.
Client checking Add-On: Event_Variables
Loading Add-On: Event_Variables (CRC:-63731247)
Executing Add-Ons/Event_Variables/client.cs.
Executing Add-Ons/Event_Variables/VCEClient.gui.
Add-Ons/Event_Variables/client.cs (63): Unknown command onTabWake.
Object VCEClient_Manual(7086) VCEClient_Manual -> GuiControl -> SimGroup -> SimSet -> SimObject
Add-Ons/Event_Variables/client.cs (63): Unknown command onTabWake.
Object VCEClient_Status(7084) VCEClient_Status -> GuiControl -> SimGroup -> SimSet -> SimObject
Activating package: VCE_Client
Client checking Add-On: Client_ZView
Loading Add-On: Client_ZView (CRC:-1628300276)
Executing Add-Ons/Client_ZView/client.cs.
Client checking Add-On: Client_WhoIs
Add-On is in the list of known bad add-on CRCs - will not execute
Client checking Add-On: Client_Warp
Loading Add-On: Client_Warp (CRC:1667141555)
Executing Add-Ons/Client_Warp/client.cs.
Activating package: warp
Client checking Add-On: Client_StereoKeybind
Loading Add-On: Client_StereoKeybind (CRC:1976101932)
Executing Add-Ons/Client_StereoKeybind/client.cs.
Client checking Add-On: Client_SRPHUDV1b
Loading Add-On: Client_SRPHUDV1b (CRC:314576925)
Executing Add-Ons/Client_SRPHUDV1b/client.cs.
Executing Add-Ons/Client_SRPHUDV1b/HUD.gui.
Activating package: SurvivalStats
Client checking Add-On: Client_Speed
Loading Add-On: Client_Speed (CRC:2121944802)
Executing Add-Ons/Client_Speed/client.cs.
Executing Add-Ons/Client_Speed/PlayGUI.gui.
Executing Add-Ons/Client_Speed/SpeedGUI.gui.
Executing Add-Ons/Client_Speed/addBind.cs.
Client checking Add-On: Client_ServerSearch
Loading Add-On: Client_ServerSearch (CRC:1223566249)
Executing Add-Ons/Client_ServerSearch/client.cs.
Client checking Add-On: Client_ServerAutosorter
Loading Add-On: Client_ServerAutosorter (CRC:1807231757)
Executing Add-Ons/Client_ServerAutosorter/client.cs.
Activating package: joinserverguifavorites
Client checking Add-On: Client_QuickSave
Loading Add-On: Client_QuickSave (CRC:-317435908)
Executing Add-Ons/Client_QuickSave/client.cs.
Activating package: Client_QuickSave
Client checking Add-On: Client_JoinGUIHostname
Loading Add-On: Client_JoinGUIHostname (CRC:-452119054)
Executing Add-Ons/Client_JoinGUIHostname/client.cs.
Executing Add-Ons/Client_JoinGUIHostname/rtb.cs.
Activating package: HostNameSerialize
Client checking Add-On: Client_InterCrosshairs
Loading Add-On: Client_InterCrosshairs (CRC:1985216975)
Executing Add-Ons/Client_InterCrosshairs/client.cs.
Client checking Add-On: Client_HexHelp
Loading Add-On: Client_HexHelp (CRC:-91673238)
Executing Add-Ons/Client_HexHelp/client.cs.
Activating package: color
Client checking Add-On: client_glitchfix
Loading Add-On: client_glitchfix (CRC:162228990)
Executing Add-Ons/client_glitchfix/client.cs.
Executing Add-Ons/client_glitchfix/glitchfixer.gui.
Client checking Add-On: Client_FriendCheck
Loading Add-On: Client_FriendCheck (CRC:189899611)
Executing Add-Ons/Client_FriendCheck/client.cs.
Activating package: FriendCheck
Client checking Add-On: Client_FixerGUI
Loading Add-On: Client_FixerGUI (CRC:-966598649)
Executing Add-Ons/Client_FixerGUI/client.cs.
Executing Add-Ons/Client_FixerGUI/FixerGui.gui.
Executing Add-Ons/Client_FixerGUI/EscapeMenu.gui.
Client checking Add-On: Client_EventsGUIPlus
Loading Add-On: Client_EventsGUIPlus (CRC:53143833)
Executing Add-Ons/Client_EventsGUIPlus/client.cs.
Executing config/client/EventsGUIplus.cs.
Executing Add-Ons/Client_EventsGUIPlus/Saver.cs.
Executing Add-Ons/Client_EventsGUIPlus/Mover.cs.
Activating package: EGplus_Movement
Activating package: EGplus_Core
Client checking Add-On: Client_EventFavorites
Loading Add-On: Client_EventFavorites (CRC:1415660113)
Executing Add-Ons/Client_EventFavorites/client.cs.
Activating package: EF
Client checking Add-On: Client_Commands
Loading Add-On: Client_Commands (CRC:-679485015)
Executing Add-Ons/Client_Commands/client.cs.
Executing Add-Ons/Client_Commands/CCmd.gui.
Executing Add-Ons/Client_Commands/CmdBuildGui.gui.
Client checking Add-On: Client_CityRPG
Loading Add-On: Client_CityRPG (CRC:696502883)
Executing Add-Ons/Client_CityRPG/client.cs.
Executing Add-Ons/Client_CityRPG/admin.cs.
Executing Add-Ons/Client_CityRPG/admin.gui.
Executing Add-Ons/Client_CityRPG/bank.cs.
Executing Add-Ons/Client_CityRPG/bank.gui.
Executing Add-Ons/Client_CityRPG/police.cs.
Executing Add-Ons/Client_CityRPG/police.gui.
Executing Add-Ons/Client_CityRPG/stats.cs.
Executing Add-Ons/Client_CityRPG/stats.gui.
Executing Add-Ons/Client_CityRPG/status.cs.
Executing Add-Ons/Client_CityRPG/status.gui.
Add-Ons/Client_CityRPG/status.cs (0): Unknown command fixPosition.
Object CityRPG_Status(7503) CityRPG_Status -> GuiSwatchCtrl -> GuiControl -> SimGroup -> SimSet -> SimObject
De-activating package: RTB_Client
Activating package: CityRPG_Client_MainPackage
Activating package: RTB_Client
Client checking Add-On: Client_ChatBinds
Loading Add-On: Client_ChatBinds (CRC:1893022100)
Executing Add-Ons/Client_ChatBinds/client.cs.
Executing Add-Ons/Client_ChatBinds/chatBindsGUI.gui.
Client checking Add-On: Client_ChaseCam
Loading Add-On: Client_ChaseCam (CRC:-804999624)
Executing Add-Ons/Client_ChaseCam/client.cs.
Executing Add-Ons/Client_ChaseCam/chaseCam.gui.
Client checking Add-On: Client_banreasons
Loading Add-On: Client_banreasons (CRC:32242002)
Executing Add-Ons/Client_banreasons/client.cs.
Client checking Add-On: Client_AdvancedMusic
Loading Add-On: Client_AdvancedMusic (CRC:-231097665)
Executing Add-Ons/Client_AdvancedMusic/client.cs.
Executing Add-Ons/Client_AdvancedMusic/AdMusicGUI.gui.