There are 2 easy ways to tell which version your Argos servers are running. Desktop clients are forward compatible with later releases, so they may not be at the same version as your database.
Argos Manager Settings
If you have access to Argos Manager, you can view your version by selecting help>about along the top menu of Argos Manager.
Communication Service Health Page
If you know the name of your Argos server, you can view the version in a web browser anywhere on your network by browsing to http://YOURARGOSSERVERNAME:7080/cs/health.