Hello @Alan Edelman
Thank you for reaching out to the Community regarding your issue, although I am sorry to hear that you are experiencing issues with your file here. It sounds like there was likely an issue on your original file that never got corrected. I believe if you'd like we'd be able to do a similar action on your main file as well by making a new account that is added as new just like in the experimental file you have. Additionally if you would like to do that we can also guide you through getting all your transactions from the start of the year if that helps as well. The old account would end up like an archived account for when you need to find specific transactions.
If you'd like to do so please let us know and we'll list the steps.
Thanks,
Quicken Francisco