I have recently encountered this and am unable to fix. I Have updated to most recent patch, used repair function, as well as reinstalled Prox7Suite.
Now the problem-When I create new folders in the VST Brower and close Samplitude, when reopening they are gone; and folders created a while ago are still there.I am able to favorite VST's in the browser, but that's it.
Any suggestions would be greatly appreciated