I had this same problem some time ago after purchasing something from DAZ (I contacted them about it, and it got corrected, I believe). In that instance, a specific library started with "$", which is an XML reserved character (one of the merchants was trying to get above "!"??). When P5 tried to start up, it couldn't parse the XML file which told it how the library set-up was last left. So P5 didn't open. I eventually tracked it down, and deleted the erroneous line, then renamed the offending directory (library). Cheers, Diolma