Maybe this will help someone... I updated the Visual C++ library to the latest version; no change. I tried starting TT versions from 2018 to 2023 and let them update files. 2019-2023 wanted to re-activate, which were ignored. I uninstalled the 2024 version, rebooted, and re-installed the 2024 version. When started, it wanted to update files (allowed), then wanted to Activate again, while still showing the existing, correct key. I tried the Add Another Key option and re-entered the SAME EXACT KEY via copy/paste, and that was accepted. I didn't catch if that was counted as a second installation. I started to work on my return, and still, several areas aren't usable. The message indicated they would be ready 12/22/2024, so we'll see.
Chris