StreamFab Amazon Downloader 4k/UHD/HDR possible?

Hello, wanted to ask if Amazon 4k/HDR (H.265/HEVC) is possible?
ONLY 1080p would definitely not be enough for me!
greetings SH

I think Amazon is limited to 1080p in a browser

If 4k is possible in the future I would spend money on Amazon Downloader, but definitely not for 1080p.