Remove Missing Files from Library?

Slowly but surely I am organizing my 30,000 fonts.
MainType does a great job of loading them.

Sometimes I see duplicate entries for fonts that previously existed in multiple places - even after refreshing the folder.

Example:
myFont.otf exists in 2 places. MT has an entry for each file.
I remove one of the files and MT retains the entry for that file. Property/Resources for the file are empty, so MT knows it doesn’t exist.

Is there a way to trim these orphans from MT (besides manually)?
Thanks.

You could create a custom view that only shows fonts without resources. Then you can manually select the ones you want to remove from MainType.