Purging Subscriber Data in WordFly

So glad to be on the other side! And thanks to Tessitura for getting the integration back online so quickly!

This event has prompted the question at Berkeley Rep of how to purge custom data fields in subscribers' accounts in WF. Basically, we're looking to purge unneeded/old data without purging the entire record. I did a preliminary search of WF's Help Center but wasn't able to find any answers. Does anyone happen to know how to do this?

Thanks so much for any insight!

Karen McKevitt