As I have just picked up a s/h Nikkor 18-200mm VR(1) I'm not currently desperate for glass.
I'm sure I'll be able to produce a better result/s without having to rely on the TC to
get beyond 35mm.
As for photo editing, I'm far to busy trying to learn my camera to delve into anything more
currently.
Way too busy trying learn the cameras many functions and handling as well as exposure
to consider looking at software at this moment in time.
I'll have to stick with the jpegs I'm afraid.
I was pleased that the TC actually produced a viewable image.
At the time I raised the question I was looking at just a body with maybe
enough change to get the 35mm which I discovered has a 52mm filter thread.
Having a 58mm threaded TC got my limited mental faculties puffing smoke
considering the possibilities.
Had I been stuck with just the 35mm for a longer period I would at least have
had some fun experimenting with it and the TC combo till finances improved.