[LongMan]

A MediaImport build based on Alpha 3 has not been made yet. So unfortunately you won't be able to upgrade yet.
There is a lot of activity in Master now so it may not be the best time for a build. Montellese time is limited so maybe Beta 1 may be a better time for a new build.
Let's see how it goes.

With regards to live updates, it is kind of a known bug. I can't remember if it was in Kodi or the addon.

Edit: Updates on the server are only synchronized on Kodi startup