Hi all,
If you are trying to download Beta 1 from the SOLIDWORKS Beta Downloads | SolidWorks page, when selecting 2021 or All downloads, it reverts back to 2020 downloads. I can reproduce that with Google Chrome and FireFox.
Workaround: login to the Customer Portal > Downloads > Downloads And Updates.
Hope this helps!
SolidworksSolidworks 2021 Beta