Old projects do not open in the new version of the FLStudio 12.5 remove this restriction.
At start writes that the version does not approach put an old version < > < > ...
Yesterday I installed the new 12.1.2 - and all was fine.
Now I tried to reopen the project done in 12.1.2 from yesterday and the error window popped up with the new red graphic ("cannot open, this file may be ...