Your VitaDock® Online software is checked on it's current version with every new start.
But of course it's also possible to check the version by yourself.
For that start the VitaDock® Online software. The VitaDock® Online icon now appears on the menu bar (MAC) / on the task bar (PC).
Click on the VitaDock® symbol and choose the menu point "info". Your current version number is showed above other information.