I just went for the upgrade last night, initially had immediate crashes and reverted to v3.5, but today realized that my dock shortcut was opening the old version, not v3.6. As they note somewhere on the website, the app is renamed RAVEN, as opposed to RAVEN MTi (or whichever you have). When I opened RAVEN today, everything seems to be pretty seamless. I'm sure there's stuff to figure out, but I loaded my default ravlay, and you also have to enable RAVEN in the privacy tab of system prefs. So far so good. Trying to figure out how to make my iMac the main screen now.... Will play more with it later.