If your missing this, you can just make a quite 'lil batch file to make a dedicated server
start Blockland.exe -dedicated -gamemode (insert gamemode here)
If it says something like "Start Blockland From BlocklandLauncher.exe.", then type in ptlaaxobimwroe with that code. So it should look like this for example
start Blockland.exe ptlaaxobimwroe -dedicated -gamemode Custom