AFAIK FoxPro is part of the xBase family of database systems and while these aren't as popular as they used to be, there is still a lot of information about them out there (and they were meant to be easy to learn and use). There are even some open source implementations (Harbour). So it shouldn't be that hard to fix things, at least for a good programmer.

The hard part would be convincing said programmer to work on it :-P.