Tellstick binding for OpenHab2

I like to work with config-files, but the GUI works fine aswell, and the link below is about this.

So I hope that it somehow will be possible to make/update these files even if they are constructed in GUI and saved in dB, as described in link

About the rain-sensors, interesting, which type do you use?
I like to make a try, when and if they are possible to use.