There is only one file type that uses the .KPG extension:
Kai's Power Goo Graphic
Image file edited and saved in Kai's Power Goo, a program that used for warping and distorting images; works best for altering digital photos.
Kai's Power Goo was originally developed by Metacreations, then sold to ScanSoft, which was later acquired by Nuance Communications.
Updated: May 12, 2009