I don't really know, but to help keep the thread open in the hope that someone who relly know joins in, I'll suggest something that might work.
In PSP, click File - Preferences - File locations. Have a look at the locations for Presets and Print templates. I think one of these locations could be where your blanks are kept. In my PSP 8 there are 2 alternative locations shown. Perhaps yours has changed its default.
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