The steps are as follows:
Step 1: Log into our game control panel
Step 2: Open the game service
Step 3: Stop your server and ensure no other services are running. You can start the server for 15 seconds or so and stop it again to close out any background services.
Step 4: Click on the '... More' tab (To the right of the start/stop/restart buttons)
Step 5: Click 'Reinstall'
Allow a few minutes for the re-install to take place. For larger games like Ark, the process may take 30 - 40 minutes.