Okay, perhaps contacting support would be best. As far as I know you need to set up the transfer on the sellers end and then there needs to be a fee paid to presonus for the transfer, from what I recall seeing a few years back. I can't be sure if it's the purchaser or seller - But - I believe the seller will incur a processing fee for the transfer of the licence. That shouldn't be a problem. Just make sure your sale is via a trusted 3rd party so you don't get scammed.