Thanks for the feedback!
In 1.02 we’ve fixed the nodes so that you can do this:
And the thought behind double clicking a node is whatever you double click is what is being previewed. What you single click is what you edit. So there are two selection modes. This way you can edit a node down the chain and continue previewing the end node. It’s also like this so that whatever node you double click and see in the viewport is what will be exported.
Do you have any other suggestions as to how it should work?
Edit:
Save project will happen soon. For now you can press cntrl + C in your node graph and paste the script into a text file to save it. Then copy and paste it when you want it again. Not the best method, but a temporary fix.