you posted a broken link.
are you seeing a photoshop error?
thanks for the reply.
i copied the alert box onto the question box. that may have caused the link break. anyway, the box says, "the lightroom catalog named "lightroom 5 catalog" cannot be opened because another application already has it opened. quit the other copy of lightroom before trying to launch." and there are 3 options in the box: choose a different catalog; continue; exit.