Sprite Stitch Board!

Hi,
This may be stupid as everyone seems to be using them haha, but I can't figure out how to open the .sth files! I downloaded the pdf converter I've seen recommended but didn't seem to do anything.

Any help would be awesome! Thanks

It goes with the KG software here.......You have to download it to view the files.
http://www.iktsoft.net/kgchart-en/kgchart/download/

Thankyou!!

So to now convert it into .pdf should I have a foxtab printer option available?
Gah...I'm so technologically retarded haha :p


UPDATE Got it working, help much appreciated ^_^