I tried the provided cable connected directly to my laptop, using an Apple USB-A to USB-C adapter and another adapter that appears to be passive. Neither works with the normal Updater.
The beta updater goes one step further: after pressing Transfer, it shows the next options (Projects, Instruments, MIDI Files, Grooves), but from there nothing else can be selected—only the DONE button works.
I also noticed that I always have to stop Reliq before the Updater can detect it again.