I hope you aren't using a Mac OS X. I have one and it took me forever to open it -_-
Is it really that hard to figure out?
...
PC: Right click a shortcut (or "alias") for Blockland.exe (it is suggested that you make a second shortcut so that you can open each version). Then, change the thing that Says "Whatever/whatever/Blockland/Blockland.exe" to "Whatever/Whatever/Blockland/Blockland.exe -mod editor. I know, compared to the new Mac version, this is unfair :P
Now, open Blockland with the new shortcut and start a new server. Click F11.
Mac:
1. double-click on Editor.command
2. Start A Server
3. Click CMD-M
4. fun
I hope this is the last time I have to post this... really.