Widget 2021 is automatically closed when trying to select a termbase

As the visulation of results in the Term Recognition Window of Studio 2021 under Win 2010 professional is rather bad for longish explanation text appended to a term in a seperate context box  (no line breaks --> text partially unreadable), I want to look terms up with the help of the Widget. But when opening the widget and trying to select a termbase, it crashes. It can be restarted then, but the result isn't any better. My termbases have always been stored on an external disk, which has nevered bothered MultiTerm (2015, -17, -19, -21). What can I do to persuade the Widget do choose and work with the same termbases?

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