Can't figure out LabelPrint

I’ve just bought a Canon MP630, bundled with LabelPrint software. I’m probably being an idiot, but I can’t seem to get to grips with LabelPrint. The online manual states that files can be imported if they’re in .cld. All my pics are in jpeg and I have no idea how to either convert them or get them into LabelPrint in their current format. Can anyone give me any pointers as to how to get round this?
Thanks in advance,

The help files are pretty detailed. There are 2 large buttons for images at the top. One is to set an image as a background and the other is to simply import an image. If your image is to be the entire label, use the background option.

“CLD” is the file extension for saved LabelPrint projects.