In general, the version number can be found in the jar file name and also available in the Release Notes that is distributed along with the Denodo Testing Tool version. For your scenario, since you have the denodo-testing-tool-7.0-20200923.jar file for Denodo Platform 7.0, 20200923 would be the version number. Suppose, If I face a similar situation and require more details like groupId and artifactId from a jar file, I would use any of the external parsing tools to obtain the necessary information.
If you still need help and you are valid support user, then you can raise a new Support case at the **[Denodo Support Site](https://support.denodo.com/)** so that our Support Team will assist you.
Hope this helps!