I have an old version (dated 10/14/2010) that I can't seem to delete.   When I move it to Trash, I get this error...
"The item “BrowseWithPMService.service” can’t be moved to the Trash because it’s open."
I rebooted, no apps open.  And still got the same error.   Then I did a force quit of finder, and finder , of course, relaunched itself, but still I could not delete the service. 
I'm assuming the new version is better... its bigger, and that means better, right?? ;-) 
There must be some other trick. Any clues for the clueless?