To find out what eFrontPro version you have, log in as administrator and from your Administration dashboard visit the Maintenance section. Over there you will be able to see the option Subscription (1).
Clicking on Subscription will get you to the next page which contains the following options
Clicking on licensing (2) will give you information about your installed version, as well as other information about your license.
Another way to find out about your eFrontPro version is through the informations page
Checking for updates
To check if there are any updates available from your system or/and to upgrade your system, visit the Updates page (3).
This page provides you information about your current eFrontPro version, when the last update was performed and if there are any new updates available.