Why didn't TurboTax 2023 uninstall when asked to by the program?

I installed Turbo Tax Deluxe with a download I received by phone thru Turbo Tax support. I never received the CD I originally ordered. After installing it and successfully creating a 2023 return I re-opened Turbo Tax to amend the return and was told that I was missing files and to uninstall and reinstall the program. (Error 214)

I uninstalled the program thru the "Control Panel-Features and Programs". The problem was that only parts of the "Program Files-TurboTax" folder and the desktop icon were deleted. Not being sure if I could reinstall over top of the Program Files, I deleted and shredded the files manually. It took forever. What I don't understand is why this error happened, when the program worked fine at first and no changes to the program were made in between the original 2023 Turbo Tax file and the edit.

If this happens again, can I write over the Program files?

Note: The Turbo Tax files were located in the Program Files and not the Program Files (x86) folder where they used to load. They were labeled as 64bit rather than 32 bit.