The beta actually shows up as 1.0.0 during boot. When you go to the Config and check the Firmware it will also say 1.0.0 with no build number. This will probably change as this goes on.
In the Instrument-list you will only see the 3 available synth instrument slots and whatever synth engine was assigned to it. To change that you have to go to the instruments page, there you should see all 5 available synth engines.
Hope that helps 