How Do I Determine Which Version of Plesk Control Panel I am Using?
If the Home tab of your control panel looks like the following image, you are using Plesk 9.x and should follow directions that note that they are for Plesk 9.x.
However, if your Home tab looks like the following image, you are using Plesk 11.x and should follow the instructions that are noted for Plesk 11.x.
While the main screen of the control panel for Plesk 12 appears the same as 11, you will notice your domain aliases appear this way in 12.x:
Panel now calls itself "Odin"