Unable to Clear signature

[kenl29977704]

I have a customer that has created & signed docuemts using Adobe Acrobat DC. Occasionally they have to clear that signature and then resign. Recently they upgraded to Adobe Acrobat Pro 2020 and now if I open those same documents created using Acrobat DC they're unable to clear the signature, which they've alwasy been able to do in the past. The "clear signature" isn't even an option when they right-click on the signature box. If they create & sign a document using Acrobat 2020, the can clear the signature, just no documents create in Acrobat DC. The customer is still using the same laptop so nothing has changed from a hardware or local profile perspective. Is there anything I can do!?!?!