It looks like the "Open With" is defaulting to trying to add to the panel.
Don't know why...
In that screen, scroll down to the Text Editor for the index.theme and set that as default.
In any image file, select your image viewer and set that as default. That should resolve the error about the panel.
Why your "extract here" is not showing on right click, I am not sure. It shows on mine. That may be a Plugin... But since you extracted them already, I suspect you have gotten that figured out.




