Restore
Factory reset for the locker
Verify is the undo. Not a fix for “it didn’t apply” — close the game and swap again for that.
Where
Epic launcher → Fortnite → three dots → Manage → Verify.
When
Crashes, leftover meshes, or you want a clean ranked night.
After
Wait for completion. Then, if you still want a swap, close the game and run the tool again.
Can I verify a single pak?
The launcher verifies the install. It does not offer a cosmetic checkbox.