I currently have the student edition of solidworks 2020 (2020-2021), but am trying to get the 2018 edition (2018-2019) to work on a project with another person, but when I get to the community downloads page of solidworks it only offers 2020-2021 and 2019-2020. Is it possible to install a student edition that is 2 years old? If so, where do I go and how do I do it?

Also, I've found different blogs and youtube videos that show how you can install multiple editions on the same pc by going to setup.exe in your downloads and changing the installation location, but for the 2020 version of setup.exe it won't let me change the installation location unless I add or remove components. Since I've already purchased 2020, I'd prefer to find a free method of installing 2018, but if that is not possible I am willing to also purchase the 2018 version.

Any direction you can offer would be greatly appreciated!