The Freeze is available on Space Algorithms. For more detailed info on which ones (and how) go to the Space update page and scroll down to Changes in Version 4.0.0[ 6 ] . I'll link to that page:
Ok, so for HotSwitch programming, let's make sure we're talking about the same thing. Do you mean the HotSwitch functionality of Space that is built into the H9 virtual performance button (middle button H9 Control assignable to Aux Switch, MIDI) or are you talking about the HotKnob on H9 (which controls the same thing as expression pedal and the H9 Control Ribbon)?
I guess in order to answer that, describe how you want to trigger the Freeze: from an Aux Switch, from the app, expression pdl, MIDI?