A way to force yourself to restart the game.

[Souper]

I'll cut to the chase and show you how to recreate the bug.

Step 1: load up KSP.

Step 2: go to the VAB.

Step 3: select a part, any part.

Step 4: remove the part.

Step 5: get another part, any part.

Step 6: Ctrl-Z.

Step 7: press launch, which is fore some reason clickable.

Step 8: watch in horror as you can no longer escape the VAB.

http://pastebin.com/GqQM4eQU <--- KSP.log

[Master Tao]

Fortunately, the steps alone were enough for me to confirm the bug. For issues you have in the future, please read the Stock Support & Bug Reporting Guide. While I believe you have Windows based on your undo shortcut and an unrelated Windows-specific bug that appears in your log, I have no idea what version of KSP you're using. Additionally, the KSP.log is nowhere near as useful as the output log, even if you'd posted a complete copy.

Anyway, I've filed a bug report on the issue tracker, though it's easy enough to workaround, so I don't expect it to be fixed anytime soon.

[Souper]

I'm using an unmodded 0.24.2 Steam install. On windows 7.

http://pastebin.com/raw.php?i=WScub2aR <-- output.log

Edited September 28, 2014 by Souper

[Master Tao]

Interesting. You get a different error than I do. Could you add your log and information to the bug report? Also, it looks like you're running KSP 32-bit. Is that right?

[Souper]

32 bit, yee.