I'm on windows. I'll spend some time trying to sort it out. I'm not a Kicad guru (or a c guru) so these sort of things always take me a lot longer.
As noted my wish is to stress test RenumKiCadPCB on a really big project. It works find on ICEZUM (which is a wonderful piece of work) but all my designs are pretty simple.
I'll try figure out the PNG issue or library issue on the laptop but if anybody has a suggestion, I'd appreciate it.