Hi daniel116
AccountRight company information should be stored for the lifetime of that file.
In older versions, AccountRight Classic v19, you could purge out information which may be why your company file is stopped at a certain period. If the data has been purged then you would be looking at restoring a backup prior to that purging. You can restore a backup via File>>Restore.
Please note: MYOB server backups are restored for ~180 days. Outside of that timeframe, it would be up to the user to maintain that copy of the data. for their own records.