I'm on W7 64-bit and I can't get WorldEd to launch properly- it brings up the window and then crashes and Windows says "WorldEd has stopped working." I wasn't very surprised that different compatibility modes didn't help, but it was a little more surprising that running it in the Windows XP Mode virtual machine didn't work either. Have others seen this problem? Anybody have a workaround/fix?
WorldEd is just fine with W7 both in 32 and 64bit systems for me... Try to turn off visual themes. My taskbar loses its transparency when WEd is launched. EDIT : However, WorldEd has quite serious lag on TD view and when you built some tiles like dirt on water.
Might be specific to the GOG version, then. http://www.gog.com/en/forum/arcanum_of_steamworks_and_magick_obscura/world_editor