When i add -mod editor and when i run block land it says invaled target and it goes on block land menu then when i try f11 it dose not work.
If your Blockland folder is in the Program Files, make a shortcut on the desktop and right click it and go to it's properties, and in the target, select all of the file path in the target box, and then delete it, but leave the properties window open, copy and paste this
"C:\Program Files\Blockland\Blockland.exe" -mod editor
into the target area
Hope that helped