Try the latest update http://sourceoddity.com/download/FixInsight_2015.11upd3_setup.exe

Please let me know if it works for you.

Good point. This will be fixed in the next update.

Yes, it supports inc-files. In your case perhaps it didn't find an inc-file in search path, or this is a bug (who knows). Can you please tell me the relative path from BusinessClasses.pas location to inc-files? Are they in the same folder or on the search path?

such function can be easily converted into procedures

Very good idea! Thanks.

Not sure about this. This doesn't work in old Delphi versions, but FixInsight has to support them.