I have just spent an hour and a half on hold with customer service trying to solve this problem. I cannot start Lightroom. I had to restart the computer because Lightroom was not responding. When I did I repeatedly get this message: "The Lightroom catalog named "Lightroom Catalog-2" cannot be opened because another application already has it opened.Quit the other copy of Lightroom before trying to launch."There is no ther application running. I shut down the computer twice and started up again, then tried launching Lightroom with nothing else opened but still get the same message. Can you please direct me to where I can get help with this? I tried the online help but got nothing in response related to this and when I try to contact someone through the web I end up back at the original help page repeatedly. Very frustrating.Thank for help.