First of all thanks a lot for using NodeCanvas and Slate, as well as of course for your interest in FlowCanvas and your positive feedback! 🙂
I would really love to provide a discount FROM NodeCanvas TO FlowCanvas, but unfortunately the Unity Asset Store simply does not allow me to do so, because it allows an “upgrade” option from package A to package B, if package B has a higher price than package A (like so is the case of FlowCanvas -> NodeCanvas).
I have even personally contacted Unity Asset Store team to give me an option to do this, but they just replied that “it’s not possible” due to the above reason.
Hopefully Unity allow us publisher to do this in the near future.
Gavalakis
