As far as I can see, there is no way to replace already connected pins with new connections, or even to disconnect nodes without outright deleting them (and if any of those are possible, the design is not intuitive/not explained anywhere). I consider these two to be basic behaviour for any node editor, so I wouldn't call this release a 1.0. Also, the clicking area for the pin connections is very tiny, so you find yourself moving the whole nodes arround many times.
The software is promising and has great potential, but I cannot recommend it in its current state.
I hope you continue updating the software and we can see all these issues fixed :)