Since it has been suggested on the comments to this question on reading BTRFS on Windows that if we wanted to discuss if its on topic, I will.
In many cases, the decision on what site's the best depends on who can best answer it. While its a linux file system created on an ubuntu system, your file system driver will likely not care. Ubuntu has no real difference as far as any distro is concerned. I also do note that windows drivers have some quirks, and someone who is used to running windows would know better who has signed drivers and why someone would want those for example.
I believe that there's a better chance of finding someone who knows the answer, since SU has both windows users who want to access a linux file system, and linux users who are occasionally forced to use windows, than a linux centric site, and the answer is really about windows software which was not developed with or for ubuntu. As such I think its not a great fit here.