Create a shortcut to BlocklandLauncher.exe
Right click the shortcut and click "Properties"
At the end of the target, add "-dedicated -map mapname" without the quotation marks
ex:
C:\Blockland\BlocklandLauncher.exe -dedicated -map slate
open it and you have a dedicated server. if you want to enable addons on the server, open blockland and enable the addons
also pacnet beat me :(