Hi Tom,
I recently did the instal for the hub this way. You can use a trim tool (or similar prying device that won't damage the finish) to pop the leather material that runs between the silver trim around the stereo and the lower plastic trim which goes all the way to the floor. The entire piece can come out if you move the passenger seat all the way to the back (the piece runs all the way to the rear of the centre console. This will give you very limited access behind the panel where the USB plugs into.
If you look at the hub you purchased you will notice on the top and bottom (the skinny sides), there are two tabs (one on each end) which can be pushed down. This is the key to popping out the hub (not the tabs that run along the side of the hub). I ended up removing the plastic trim behind the hub which wraps around the cubby passthrough for easier access as well as some of the lower plastic trim that runs to the floor. However, knowing what I know now, you may not need to do this if you can get a long screwdriver in to push down the top tab. Once you have it pushed down you should be able to pop the top out at least. If you can get access to the bottom without removing more trim, do the same there and the unit should slide right out.
As I mentioned earlier, I ended up removing the plastic behind the console around the cubby pass through as well as the lower trim that runs to the floor area. This allowed me to get my entire hand in behind and squeeze both tabs (top and bottom) and push the hub out. In hindsight, having known the top and bottom tabs are the key to removing the hub, I may have been able to pop it out without removing as much trim.
Good luck with the install. It's worth it in my opinion. Siri is much better at understanding voice input for navigation than Sync, not to mention that your maps will always be up to date.