This update fixes an expired digital signatures issue that prevents all earlier versions of the game from launching. This is a required update. Please download and install the update before launching the game.
WHAT’S NEW IN VERSION CERTIFICATION PATCH
Install a license key using a registration key file?
1: Click Install Key after navigating to Tools & Settings > License Management > Plesk License Key.
2: Choose Upload a licence key file.
3: Click OK after providing the path to the key file you downloaded from the email.