K_shadowfall
First, I can make this work on my PC with both streaming files and locals using my Oculus Rift and one android phone. It works, but the movements are not perfect accurate, honestly.
I think the green button next to SLR connection won't show up until you are signed into the SLR app and the SLR website on the phone you are using for viewing and you put on your headset. Not sure.
That said, to me the prime potential advantage of the SLR app is that it works through your PC and an attached Oculus Rift which seems to have a much better viewing experience. In my opinion, if you are using your phone for viewing, you are much better off with using the feel connect app and downloading files from Wankvr and some of the other sites that work with the feel connect app. You need only one phone and the motions are much more accurate.
I much prefer the Rift for being more immersive.
I am sure that SLR will work out the bugs eventually.
Did you see the instructions here?
https://www.sexlikereal.com/blog/post/id/154-complete-instructions-for-using-slr-interactive-with-your-fleshlight-launch-kiiroo