This m3ter Connector for Salesforce changelog explains how to check for the Connector version you have installed and lists the new features, functionality, and updates added in each version release. The latest version is listed first.
In your Salesforce organization, navigate to Setup > Packaging > Installed Packages. You can read-off the Version Number of the m3ter Connector:
Parent / child billing relationships between existing Accounts.
Ability to trigger data synchronisation to m3ter from a Salesforce Trigger or a Flow.
Support for Account, Contract and Opportunity data synchronisation to m3ter.
Login to the Support portal for additional help and to send questions to our Support team.