I just lost some serious progress because I closed LMMS after recovering from a crash and forgot to save the project. LMMS deleted the recover.mmpz file and my progress is lost forver. It'd be great if it didn't do that, and name the recover files with Process ID and date like this:

recover_PID7632_2015-07-09-1348.mmpz

It'd make all recover files be there if needed. They are not very big, could be automatically removed after a month or something. That'd greatly increase the crash recovery probability and make it resistant to running multiple LMMS instances that overwrite recorver.mmpz causing data loss.