Need help with a little problem. I have a crossword key register which I created years ago on a Macintosh. It’s FileMaker Pro 2.0. Now I want to send this register to a fellow crossword constructor who likewise has an old FMP version, namely 4.1, and uses Windows (Windows 10, he says). I tried to give him a sample but he just says that my file was a ”.DAT-file” that his FMP could not open. Could it be that one has to insert a file suffix?
I might mention that the register has two, I think, repeating fields, which must be preserved when saving or converting. How do I go about?