CCleaner hangs....

Mid-2009 MacBookPro 5.4, OS X 10.8.5, 4 gigs RAM

Downloaded the latest version of CCleaner for Mac, as the previous one I had kept seeming to hang. This one seems to as well. I get a progress bar that always stops at the same spot. When launching it, Preferences under the File menu is also always greyed out. Any idea what's going on? I have to force quit every time. I use CCleaner on my PC at work and never an issue.

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