Sorry I wasn't clearer, @2020matters :-(
As I've discovered, purchases of download albums (in my case all classical - by composer then work then performer) are all initiated at/from the Qobuz website.
FireFox allows this process to work. I can select what I want, pay for it and download it.
(For me) Safari does not: it puts me into the loop of my steps 8 to 14 above. I can only select an album, which appears to go into my basket. But using Safari (my preferred browser), I can do nothing else.
Once selected, paid for - though only with PayPal - I can download it using FireFox.
The listen to it as I want - usually Roon.
Happy to elaborate if I've confused things further :-)
I do hope you can do that on Windows (which I don't know very much about): initiate in FireFox, pay with PayPal and download at your pleasure again in FireFox. Do message me if you think I can help :-)