I think I will run into that problem soon, every time I reset my pc it asks me to authorize my pc and my POD UX2 and now I have one or two left I had done that on my old computer several times, I want to install on my MAC but I'm afraid that I can lose my extras, sometime in the past I read that you have right to Authorize 3 devices at the same time and 10 devices in the lifetime of your account and up to another number of authorizations for Each POD device, so I'm the second user of my POD UX2 and I have almost exhausted my 10 times authorizations with my profile, it's something that I never understood from Line 6 and I really want professional support from them!
Unfortunately I can't help but we are in the same boat!
Cheers!