I made this panel, first of all thanks for your interest in it.
For the load command I just tried and it works for me, are you sure you connected midi in and out to the panel and synth?
For the snapshots, as you guessed it’s been made with an older version of Ctrlr and I don’t remember having them. Guess I should take a bit of time to understand how they work and how I could make my panel use them, or don’t hesitate if you feel like modifying the panel.