Sorry to hear that.
It did the same thing on my Mac, but when you select the song you are working on, does it point to the original MiniMg sound you used or is it totally missing from your song?
If you have the original folder stored on your PC, you should able to point manually to the sound you originally used and open it, as it should be highlighted with a white dot when you scroll through your sound
C://Program Files/Steinberg/VST Plugins
I hope this helps, but if not you will have to maybe try logging a call with Arturia.