Brandon,
The re-install didn’t affect any licensing or the structure of my system drive. Everything remained the same, untouched.
I’ve just checked the Foundry plugin I have for After Effects. It’s working fine (node locked).
Pro Res 4444 is working as it was prior to upgrade. No dropped frames at all with audio and video running via my Decklink card.
Basically it appears that the re-intall works in the same way as the upgrade of the OS, as it doesn’t mess with your previous disk image other than updating OS components.
Why has this worked? I’m not entirely sure. Perhaps something wasn’t installed properly during the upgrade process compared with what occurred with the re-install.
Good luck.
Adam