I highly doubt your files have been lost, said "Advanced Member
Are you on a MAC and using the RM program crossover version? I have used this for a few years now. I am experienced too. I continually have error messages, and frequent freezes. Just to double check my knowledge, Fellows, I had someone more tech than myself. Thankfully, we found the specific file after great digging. three years now...
I see a lot of comments related to keeping up with My Heritage, Legacy, etc and all their bells and whistles. For experienced, even professional genealogists, most of those bells are not used or of interest either. What good researchers need and want is a flexible database, well formatted reports, documentation tools, notes: person, place, family, events, etc including research notes and evaluations of evidence. And have confidence in the program's stability. Having to stop your research to reload the program and fix mess-ups resulting from RM or any program's instability. But, silly me, it boils down to the competitive market place.
RM is over all a very good program, no question. I've talked many a client into buying it too. Interestingly, though, more and more are using, exclusively, Ancestry trees. When I teach genealogical fundamentals class, I find that many think Ancestry is software and all the trees are accurate! (these folks typically use no other program). But that said, many of our students who have advanced more in their skills and understanding of genealogy research do use various tools, software and want the features mentioned above. They also use templates and tools in word and excel to keep data and comparative tools not either available in software or need a tool more applicable to their research.