It definitely takes some getting used to. The first thing to remember, is to set your paths (where KToon is installed, as well as where any temp KToon files will be saved)
I am working with the program on a different set-up than Dadster, but please, by all means give his suggestion a try. KToon seems to be a really nice program
It is (for now) a lesser known product but, we'll hopefully change that... That is what we are trying to accomplish here. To expose our members to the various graphics programs available for Linux.
If it's worth a try, it will be listed here. I am currently checking out a few for submission here.
Thanks for the info and the link Dadster