Verifies your game license and logs you into Social Club.
Go to the (or Local Files ) tab on the left menu. Click the Verify integrity of game files... button. Gta V Launcher Exe File Download
What pops up when you try to open the game? Verifies your game license and logs you into Social Club
Outdated GPU drivers can cause the launcher to crash immediately upon opening. Gta V Launcher Exe File Download
In both cases, the appropriate launcher (Steam or Epic) will handle the communication with the Rockstar Games Launcher in the background.