FLStudio 12.5.1, I have had issues with my Waves plugins. I have followed all other solutions regarding this topic and still...nothing.
Any project that I made (before 12.5.1) that I now open up on FL 12.5.1 cannot find ...
FLStudio 10/data/Projects is unavailable.
If the location is on this PC make sure drive is connected or device is connected. An then try again
If the location cant be found it has been moved or deleted
In this case ...