My 1st ever post here (and all the way from Oregon), but thought important to say, as I spent 2 hours trying to download V10 for Liquid capability.
Here's the key: in the Rig Manager under 'file' then 'preferences', you must click on the button "include beta test versions" and apply it. I would restart too after that.
Then you're good ta go with getting the Rig Manager to update for this. Enjoy!