When I start "Vegas Pro 18" I get the message about a "Major program update". If I start this update "immediately" a messagebox appears that "Magix Audio Cleaning Lab Update" will be started now. And this update fails because "Magix Audio Cleanup Lab" is not installed. Is "Audio Cleaning Lab" mandatory for running "Vegas Pro 18 (Setup)"???
I downloaded the VEGAS_Pro_18.104.22.1683_DE-EN-FR-ES.exe as stated in the other comment. And after installing this version the "Audio Cleaning Lab Update" doesn't appear any more :-) Thank you very much for this ultrafast feedback!!!