Effects Rack Presets have vanished

Hello - I'm really hoping someone can help me with this...

I use Audition for several hours every day. About a week ago I finally installed Audition 12 after using Audition 11 for a long time, and everything migrated over perfectly. But then earlier today I shut my computer down (after saving everything and closing Audition as normal) and then when I just turned it on again and opened Audition, suddenly all my custom effects racks are empty. I tried opening Audition 11 and I got the same result.

To be clear: All of my individual custom named effects are still there, and all my plugins are still there, and all of the effects racks that come built-in as Favorites still populate properly - but when I open any of my custom effects racks, they're just empty. None of the individual effects are there.

I'm running Audition on a Windows 10 desktop that I've been using for a couple of years - I've had other problems with Audition before, but never this. The only thing I did differently this time was that after I shut everything down I unplugged the power bar from the wall because there was a huge lightning storm approaching and I didn't want to take any chances.

It would be quite a pain to have to rebuild all my racks - does anybody know any way of getting them back?

Thanks,

Brian