I thought this information might come in handy for other Hubitat users:
From @hydro311:
You can use a QR scanning app to capture the QR's numerical output -- it'll be a long string of numbers. The iPhone's own camera may even be able to do it.
The DSK string you need to put in the SS Manager App is 40 numbers (8 groups of 5). The QR scan output is longer than that, but you just need to find where the 5-digit DSK starts in that output (it's unfortunately not at the beginning, at least in my limted testing here), and then go from there -- copy the 5-digit DSK and the next 35 digits after it (40 digits total).
That's a lot of futzy parsing to carefully muddle through, but it should work.
From @rewilson42,
I was playing with this earlier today. The 40-digit code starts with digit 13 (capture the QR using your phone's camera, throw away the first 12 digits, then the next 40 should be the code--check to make sure it starts with the 5-digit DSK).
This may be useful when pairing for Z-Wave LR (long range).