Hey Cheras,
Unfortunately, there's not really an easy way to transition from v1.0.0 to v1.1.0. We're really sorry about this.
Since releasing v1.1.0, we've realized that this is a problem that we'd have to address, and we've put some code in place to help detect what versions have been used, so future releases (starting with the next one) will be able to help update projects/prefabs to for newer versions (similar to what Unity does).
As far as we can tell, the best thing to do would be to use MaterialUI like you would uGUI, and we should be able to take care of the rest.
Let me know if you have any other queries :)
~ Declan