Is it possible to use older version (2020) of SU with subscription licence (solved)

I have a subscription to SU pro. An extension I use does not work on the 2021 version. it looks like i can download older versions on the SU website but i need a licence number which i can not find as I only have a subscription. so my question is, is it possible to use older version of SU with subscription licence?

Thanks in advance.

Never mind, found this link was able to download 2020.

Which extension?

OpenStudio, apparently it uses an older version of Ruby and has not been updated yet.

Reference: https://unmethours.com/question/49101/open-studio-plug-in-does-not-work-with-sketchup-2021/