I have an app that I'm trying to deploy to my own Gear S2. I have generated all the required certificates with Samsung by following:
http://developer.samsung.com/gear/develop/getting-certificates/create-certificates
When I try to Run as Tizen Web Application from the IDE everything seems to work fine, I get no error, but nothing gets deployed on the watch. I still see the old watchface.
You need to long tap on the watch screen where the watchface is shown, then browse watchfaces on your watch by left or right swipe/beezel rotate. And click on your watchface to set it.