: Library → Right-click Game → Manage → Browse local files .

The file name might appear as GTA5.exe (Capital letters) or gta5.exe . Both are the same file.

Never move GTA5.exe. Don’t rename it. Don’t delete it “to save space” (a surprising number have tried). The game expects it exactly where it was born. Move it, and the launcher will cry “Missing executable” while Los Santos remains stubbornly unloaded.