Updated my backup for my main one to 7.3.0 from 7.2.6. Everything is working fine. My UPC also is working fine, with no need to download NUT. I did have to contact customer servicer before this due to my license being tied to my old email back when I bought them both in 2013. Once that was done and they both showed up on my unraid.net account I had no problem. I have already transferred the license of the backup one to tpm and went smoothly. So for anyone receiving errors when trying to link your keys to your account, be sure its not that you used a different email to purchase the keys compared to the one you use for your unraid.net account.