Actually it's worse than I thought.
I tried putting a character in the map and a path for it to follow. Once placed I cannot then select it, or my start marker. Even restarting GG and re-opening the map doesn't cure it. I'll see what happens with a home-made ebe.
In fact, forget it. The application is simply too unstable to use. On Win10 I get C++ runtime errors as likely as not trying to save or run a level. On Win7 it stops running properly if I hibernate the machine.
I'll save the disk space for now and come back in a few more years to see whether it has settled down.
You can't teach an old dog.
