Changing from Mac version to PC

I have recent bought a PC computer and I bought the Mac version of Avast earlier in the year, I was wondering if I would be able to change without canceling my subscription

Do they have it written somewhere on the subscription buying / support page, if their subscriptions are given to a device or to a person?

Also, I found a similar question from a few years ago, and the onlyl reply was to contact Support:

https://support.avast.com/contact/