Hi David,
No need to install all versions. Choose one version from 10, install it, and check the courses created with that version. Continue with the courses using that application, and don't install all versions from the learning path.
Mendix officials should update the corresponding version of the course to the latest studip pro version in time, such as generating all 10 versions of MTS/LTS
In this scenario, just try to use the most recent version and as a best practice - you can start with any MTS or LTS versions which are stable versions and that way you can stick to only one stuio pro as mentioned above by @pragadeeswaran. And, if those get outdate and you need new ones then upgrading your projects to a new version is pretty quick.
Cheers !
Its an annoying issue with the Mx academy content.
If you need more detailed support on stuff you have questions on; drop me a message.