Refresh Freeze Files
Create fresh copies of “frozen” tracks. All tracks that are frozen get re-processed. The operation cannot be cancelled!
Freeze tracks in Logic Pro — Apple Support
When Enable Complete Features is selected in Logic Pro > Preferences > Advanced, you can freeze a track, reducing the processing power needed for playback. This reduces its processor usage to that of a high-resolution audio track with no effects plug-ins, regardless of the number or complexity of the plug-ins actually used on the track. Freezing is particularly useful for software instrument tracks and for audio tracks that use complex effects. It is not available for multi-output software instruments.