Unifi 1.6 is out today, with support for Revit 2016. If you want to automatically update Unifi before you open Revit, simply add a Unifi shortcut to Windows Startup, like this:
Note: depending on your currently installed version, it may be more appropriate to launch from:
The next time you open Revit, Unifi will already be nice and updated and ready to go.
If you are wondering “What is Unifi anyway?”, check out my review at this link.