Not yet
Not open yet.
The software works and it is finished. The download and the store open on the same day, and that day has not come yet.
Until then
Write to contact@audiolaz.com and you will be told the day it opens — one e-mail, nothing else. Say which Roon Core you run and which room you want to fix, and the answer will be useful rather than generic.
In the meantime, the home page shows what it does, on a real room, with real numbers — and measuring your room will be free the day it opens, with no licence needed.