BB Manager 1.64 crashes

I’ve been having a lot of crashes and difficulty keeping files working smoothly. I’ll go to synchronize and sometimes get errors that various files or folders don’t exist. I’ve tried exporting to SD card and over writing the card and still I get error message later. while listening to various beats within the manager software if I’m working on editing the drums and going back and forth it will sometimes crash. It will sometimes reopen then none of the files will play but they show up and you can see the tempo bar moving with no sound. Later it might begin working again. Just not sure what to do. As a precaution I saved a copy of the project file and later I tried to open it and it gave me a message saying it wasn’t a valid BB file? What could I be doing wrong?

Thank you,