Fell in love with your programm))) But I can see several things that can make Symbinode even better at this stage:
1) New project opens automatically when app is launched (it's weird to go to File > New each time I start it)
2) Ctrl+S hotkey to save the project also will be great:)
3) Not sure what exactly Export does now, but I spent some time trying to get my png's. Anyway it's awesome that Node View allows to save image at any step (I personally used it for masks as well as for final Albedo/Normal etc.), but it's not obvious where to click for newbies right now)))
4) I'd like Symbinode to have option for saving global preferences as well as per project (for example I want my default resolution to be 4k for each project I start, without setting it each time manually)
5) And the one that I really miss)))) In blender new nodes can be automatically attached to already existing node-connections or removed from the chain without breaking connection. It would be super awesome to have this feature, since it saves huge amount of time when you don't need to manually connect all the nodes.