I do not specifically know if the Career progress is wiped/reset as I had not tried that part of the sim.
The log-book is cleared so it would be logical the career would be wiped to in my opinion.
Personally, I had not flown much in 2024 so I was not worried about resetting any progress I had made, or for that matter controller profiles or other sim settings. I was happy to sacrifice that if the end result was a sim that was no longer CTD’ing.
For me the result was good. I wish I could advise this will fix most CTD issues but really I could not. I would rather start over with a sim that works though than one that is unreliable and in the long run will just frustrate me. 