It is not currently possible to change the registration type of a record in a registration form.  The established record is tied to the registration selections made when it was created.

Delete and request a reregistration, if possible.

Blackbaud has an idea bank our clients can go to and list any suggestions they have for our programs. You can go to to enter suggestions and vote for you favorite suggestions as well. This is a direct line to our programming team and they look at this for enhancements to the software.