Windows 10 License and software

Dear, I’m using Audirvana last version trial on windows 10 and I’d like to buy a lifetime license.
When I bought it I’ll have a software and serial number to use for future installation

Thanks a lot

There is no such thing with Audirvana. You buy a license, and as long as you stay on the same version it’s a lifetime license. For major releases you need to pay a (small) upgrade fee.