This version 1.2 update for Rome: Total War includes a host of changes and fixes to both single-player and multiplayer modes. Check the included read-me file for a full list of changes.
WHAT’S NEW IN VERSION
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.