The latest version (currently v15) should always be the default one selected on the login page. This should be easy to do, and would save us an extra click on almost every login.
The 'Remember me' cookie does not help as we have to regularly clear cookies during testing.
The last 'idea' for this is marked as "Implemented" - but it has fixed the version to 14, rather than dynamically selecting the first version in the list, which is (should be) always the latest version.