Namuras

I downloaded the Paper Farm Assets from within the current version of Affinity Photo. They show up in the assets panel but they aren't accessible (grayed out). The provided instructions surprisingly tell us that they have to be imported by the user (why not automatically after download?) and that you should navigate to the Snow Overlays by Paper Farms folder - but don't tell us where it should be located. I searched in drive C - whithout any success. So where are they hidden?