I had the same high ~50% CPU usage-when-idle issue with Paint Shop Pro XI (v11.20). In researching this issue, I found the problem was described as PSP gets caught in an endless recursion when indexing files for the Organizer. See site link below. This was the problem too in my case - I had created shortcuts to other folders.
The fix above sounds great, but the way I fixed it was by going into PSP Preferences. In the Organizer section, Folder Exclusions, I excluded the folders where I had created shortcuts. That worked, but since I don't use Organizer at all, I excluded my entire C drive. Bingo, PSP starts faster & doesn't use any CPU when sitting there.
Here's the site where I found the Organizer bug info:
http://www.retouchpro.com/forums/archive/t-14578.html
... scroll down (a bunch) to westguard's post from 09-26-2007, 06:54 PM, "CPU Issue Resolved"............
Hope that helps someone.
-Wick
http://www.CarComplaints.com
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