same as SquareSteelBar ,TDW !
your last version (.11) is working for me too BUT :
1. huge parts of the window are out of screen range . i am also have set the monitor to 1024x768 and almost all the lower part (with the adjusters) is out of screen range . i changed my screen resolution to maximum set (1680x1050) and still not all of it were vissible
2. still unable to change gradients or Terrain.act files (by pressing 'g' or 0-9).
editing ,updating map and saving is working perfect.
still can't find the fuction that app is 'reading' from gradient but saving to terrain.act
get the DebugView from here:
http://www.speedyshare.com/files/30068925/DebugView.rar
ps: .NET framework 4 is installed (win7 x64)