While in AM, i accidentally clicked Build without choosing my mod. Couldnt stop it, and now when i go to the game, i hear sound but theres no graphics, just a black screen. The only shortcut GD recognizes is Alt-F4 (close to desktop).
Is my game destroyed, or can i recover it?
Verify your game files. (Or just reinstall)
Every modder has done this at least once, myself included.
Can confirm, happend to me at least thrice 
It worked. I took the opportunity to upgrade a full point up to 1.2.0.5a, but im getting “Tag not found” texts in those new instances. Happy with this and the changes. Just glad i didnt lose the maps ive worked hundreds of hours on. 