Upgrading file-based TMs from navigation
You should upgrade file-based translation memories (TM) to benefit from the latest and most accurate translation hits resulting from: the reindexing of the latest translation units (TUs) and fragment alignment matches. Remember that upgrades apply to file-based TMs only.
About this task
The TMs which require an upgrade are identified by the non-upgraded TM icon, while the ones already upgraded are identified by the upgraded TM icon.