The good news is I've managed to get this app to run properly from A5v6 and A5v4 with the same files. That's because my new runtime is for v6 but we still have some Win95 machines. Yes, it's possible to edit forms in v6 and then open the forms in v4.

The current stumbling block is the directory structure. The app uses C:\A5v4\MyApp\this and C:\A5v4\MyApp\that (or C:\A5v6\MyApp\this and C:\A5v6\MyApp\that). The runtime wraps up C:\A5v4\MyApp but doesn't get this and that. Is there an easy way to make the Setup file include the subdirectories? I tried adding them with WinZip, but Setup.exe would not accept them.