Delete character categories created with Tools > Create > character

I created a curve object and I clicked Tools --> Create --> Character, in CorelDraw X7. I saved it with a "new name". The character category is listed now in the list. The font is also listed in the text properties. But, I'm unabe to delete the character category. I don't want it anymore. Where are the custom character category files located in Windows 7? Please help me delete the character category.