MainStage broken after High Sierra install

I am completely screwed after upgrading to MainStage. I have Logic 9 and 10, maybe that's the problem?

ALL presets are not performing as they should. They are not there and won't allow me to save them. After was finally able to find the Presets folder in the User>Library>Audio and am luckily able to load them one at a time. But the list of presets is gone and not remembering loaded presets.

ALL User Channel Strips are gone. Same problem as above.

ALL references to sample locations for 3rd party instruments won't connect correctly.

I did manage to find the old folder which I had called Logic Music Files with all my 3rd party samples but it was in a .HDF+? location, not where it should be. I left it there, performed a time machine backup, then moved it back to the original location. It was worse...

MainStage is NOT compatible yet with Hight Sierra and Apple should not have said that. I have important gigs coming up.