Solidworks 2021 to 2024 or 2025 Server License Upgrade

Hi,

We have a perpetual license for 60 users at our university. Our version is 2021. Do I need to pay any fees to upgrade it to 2024?

My second question is, I want to log in to the SolidWorks portal but I can't find the email address we registered with. How can I find it?