I am still using Q98 and it does use categories. I have read about conversions that were successful and some that were not. Most complaints were categories. Could these have been records; (1) the category was blank; (2) the system was expecting standard categories vs customized categories because the customized categories hadn't been converted; (3) the payee wasn't included in the memorized list; (4) the record wasn't reconciled.
I would hope that the conversion wouldn't change/amend/edit reconciled records but I do not know that??.
Maybe a super User could answer that ???