Termbase not showing any terms

This is a really common issue that has been flagged loads of times, so I'm surprised we are still dealing with it...

I'm working with Trados Studio 2021 Freelance edition.

Have a termbase, it's full of terms, I know they're there.

Deactivating and re-activating the termbase does nothing, shutting Trados down and rebooting it doesn't do anything. The term recognition window says 'no results available' which I know isn't true, and when I add a pair just to make sure, as suspected, it tells me the term is already in the term base.

Any ideas please?

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