@widdly not sure if you need the editor to try the patch. It might be possible to just transfer it to the USB stick in your PFM2. You might need to add the correct extension to the filename, though.
Incidentally, Xaxier's editor isn't made with CTRL, I don't think, though he did use the same cross-platform GUI library, Juce, hence it looks like a CTRL editor, with the default control graphics.
a|x