Hi Kevin,
I've run into this too with a new Twin MkII which I bought new at a very good price after the Twin x came on the market. I already had an SF and an x8 in system one.
I installed the Twin, putting it into system one, and only 4 of my plug-ins would work, the others showed as not being authorized, and hitting the Authorization button in UAD Meter and Control panel would not authorize the plug-ins.
I phoned tech support at Sweetwater, and Chris at Sweetwater had me go to UAD Meter & Control Panel
1.He had me tell him the the version number of the installed UAD2 software (at system info in the UAD Meter & Control Panel), to be certain it was up to date
2. He told me to save the Detailed System Profile – bottom of page – and give it a new name.
3. Then go to plug-ins and Authorize again in UAD Meter & Control Panel.
It worked.
:- Don