I am no expert with osticket, but I have switched app versions and then did a restore from the original database backup. This assumes the database structures are the same between the old and new version. The actual program code doesn't mean a lot since everything variable is stored in the database. I would try this method and you can always reload the original software if it doesn't work. Do NOT just copy the database file. Do a backup and then a restore. The new created database with the same name as the old one can be deleted then restore the original database with its original name. Do NOT leave the present database to be reloaded with new schema generated by the new version and expect to have your old tables in tact.I rarely found upgrade software actually work right. A new install works best.