The current Babylon Version is Babylon 12.
If you are using a version that is older than Babylon 12, you will receive a popup message asking you to either update to the free version of the Babylon Translator, or upgrade to the Premium version.
If you own a monthly or annual subscription for Babylon, you are not required to purchase. Simply download the latest version and enter your license.
If you are using Babylon 12 and you are getting that message - please open a ticket without support to investigate the issue.