Hi,
Last time I checked with Vectorworks, the service select package was £540 for a year. You get access to quite a lot of stuff with this, including automatic upgrade to new releases such as version 2022 when it comes out. Here is a link to the full benefits of the service select https://www.vectorworks.net/service-select
Also - you just get a serial number with the license so you should be able to download and use this on whatever platform you have. We currently have it on Mac but not an issue if you want to run Windows.
thanks,
Matt