Really great job. Here are some notes, and what I've been up to:
I reached out to irscrutinizer to see if we can get direct hardware support built in. I don't have time, I'm hoping I could get some help from them with my support.
I actually just pushed an update so flirc spits out better ir output +1231 -12132 etc, that can be directly imported into irscrutinizer
I have a commandline app that will print out the pronto hex codes directly, I will share that in a second.
I would be happy to provide some source or a python wrapper for you to play around with a whip something up.
Can you share your files you created? For the benefit of the community, and I will include them in the next release.
We don't support only JSON importing, but will support a simple text file too, as outlined here:
** Edit **
For some reason my app CI isn't auto updating, here is a copy until I figure out what's going on: https://flirc.io/nightly/Flirc GUI/mac/Flirc-3.26.5.dmg