Just now I downloaded Sound Forge Audio Cleaning Lab to run on my LinuxMint computer. But it seems that the download was for a Windows system...! What can I do - is there a Linux version ?
Magix software products are (almost) universally Windows only, sorry. (There is one, Independence which can also run on MACs, but nothing for Linux.)
I don't know if there is any method by which the user can run Windows software under Linux but if not, and you have bought SFACL4, you need to email infoservice@magix.net and ask for a refund.