AWESOME, you rock, seriously! Thank you very much. I uninstalled, installed new version, re-paired, did initial setup. Seems to be stable now for me. I kept getting the permissions popup after allowing Location, and thought, hmm, maybe it needs access to save photos. I added that and all was well.New version in the first post, 1.5.00.1-4
Download link is in the first post
I've also added a section to the first post advising about the bluetooth issue caused by Samsung Accessory Service. On the Samsung device I tested on, the old version of Accessory Service was required even after the initial setup, or it would not connect, so that is also advised if connection fails after updating. The section on WiFi now also emphasises the requirement to disable mobile data, as people are still reporting the loading "bug" with screenshots showing mobile data enabled - please read and follow the instructions, it does work!
Thanks again.
Now if I can get the old "WEAR" app working so I can use my old watch with new phone.