Hi Nik,
you could try to start the Designer Studio from the portal itself.
If it does start, you can open the task manager, display the command line column and take a look at the parameters.
In my Designer Studio shortcuts I use
"C:\Install\DesignerStudio\2022.1.4.155\app-20221.4.155\WEBCON Designer Studio.exe" -portal "https://.....cosmocloud.eu"
"C:\Install\DesignerStudio\2022.1.4.127\app-20221.4.127\WEBCON Designer Studio.exe" -protocol "webcon://https://.....webconapps.com¶meters="
"C:\Install\DesignerStudio\2023.1.1.56\app-20231.1.56\WEBCON Designer Studio.exe" -protocol "webcon://https://.....cosmocloud.eu/?Context=/db/1/app/9¶meters="
Seeing them beneath each other, I wonder why I'm using different ones. But I don't care at the moment, they work just fine.
Best regards,
Daniel