Error from uninstall.exe, Catia V5

Dear Everyone,

because I took part in a Catia V5 training at my university, I still have Catia student V5-6R2020 installed on my pc (Windows 10), but since the licence provided by my university expired over one year ago, I didn't use it ever since.

That's why I tried to uninstall it now. An online search led me to the UNINSTALL.exe in C:\\Program Files\\Dassault Systemes\\B30\\win_b64\\code\\bin. However, when trying to run it, even with administrator rights, I'm only getting the error
"Uninstall.exe : Bad parameters".

How to run the uninstall.exe properly? Or what's the recommended way to do a clean uninstall of Catia V5 student?

Thank you very much for your support.