Any way to delete a bulk of Folders?

Hello,

After upgrading from 11.5.10.2 to 12.1.3 on a test instance, we are having an error when open the invoice form:

FRM-41045: Cannot find item: invalid ID.

Now after searching for this issue we have found the solution:

Log into your System Administrator responsibility.

      Navigate to Application -> Administer Folders.

      Query the folder of your interest

      Delete it from this form.

      You can then create a new folder, if desired.

The problem is that we have a big number of folders that each user has created for each form he uses.

So is there any way to delete those folders in a bulk? Any other solution with keeping the folders would be great since we have to rebuild them all on R12.