FLStudio 10 to FLStudio 11. None of my songs transferred to version 11, so I opened the song through my hard drive pointing to version 10, and the song opened, but when it did, sounds had changed pitch ...
FlStudio 12.
I did most of my FlStudio work on 2 older PCs and about 6+ different versions of FLStudio.
All of the samples used to be stored in a folder on the desktop of the C drive ...