Compatibility files

I have an oldish program from my XP machine which reads and writes
mobile SIM cards.
I have installed it successfully and it runs OK, except the dir where
I store the output file shows no files present until I click on
Compatibility files on the top menu bar and they appear. Sadly don't
seem to be there when the program attempt to open them.
I am completely fooled by this.
Can anyone help?

Many thanks,
Martin J