How to delete format strings in converter function



if I use format strings with the converter functions "tag -> filename" and "filename -> tag", these format strings are saved and so I can use them again by choosing from the list. That's great - but the problem is that the lists becomes longer and longer. And so I want to delete a few (NOT ALL) format strings from the lists. Is this possible? How does it work?

Thank you very much.

Best regards,


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