Most platforms will update automatically, but if you need to trigger it manually or fix a broken installation: : Right-click Grand Theft Auto V in your library > Properties Installed Files Verify integrity of game files Epic Games : Open your library > click the three dots next to GTA V > Verify files Manual Update (Backup) : If you have a backup of version 3179, copy the GTA5.exe (launcher)
Here is the exclusive breakdown of 3179 1: