LR will not boot. I am receiving the following error msg. I do not have an additional copy of LR on this computer. PS boots just fine. Any help is appreciated. I have one copy of LR on my desktop and one on my laptop. The laptop version will open with no issues. Only the desktop copy will not boot up.
Error message: The Lightroom catalog named "Lightroom Catalog" cannot be opened because another application already has it opened.
Any help is appreciated.