You probably don't need to reinstall.
The "To busy" bug prbly resulted from atempting to open a transaction with the AA vendor. The transaction started but since the window never opened, you never actualy closed the window to cancel the transaction. Zoning should fix that problem, logging definetly will.
If you do decide to reinstall, you shouldn't need to reinstall eq2maps. Just unzip the Fetish ui to the Everquest II directory and run the map updater
Oh and remeber to trash the eq2ui_popup_acheivementmerchant.xml file.