Hello,
It is not from me but I looked for a Solidworks alternative and I found Inventor pro and all tools needed.
You need to download Inventor with the link provided in the attached file and install it.
The trick is to uninstall v.10 and install v.9 Autodesk Licensing Service
Open your file explorer , paste this in address bar :
C:\Program Files (x86)\Common Files\Autodesk Shared\AdskLicensing\
and run uninstall.exe
Wait few minutes till all files disappears, and just to be sure remove AdskLicensing and ADLM folders in C:\Program Files (x86)\Common Files\Autodesk Shared
Install Adsk in ver.9, wait till the process end. Disable network adapter, run 2020 keygen and activate your 2021
You have to run the keygen in admin mode.
Hope it helps