I had a similar problem last year and wasted hours until finally got someone to help me fix it. If I remember correctly we modified the extension of a file to get it to run, changing it from '.dll' to '.dl' or vice versa. The TT program was downloaded onto my PC off a CD bought at Costco.
Had a new issue this year (using a CD purchased at Costco) TT Updater would not run on the program downloaded on my PC. Again wasted hours with the TT support but got nowhere. Ended up downloading the s/w from my online account using the license code from the disk. Moved the 2023TT.exe file over to my laptop and ran it including updates installed with no problems. Not sure why I had problems on my PC. Both are running fully updated versions of Windows 10.
