i am trying to open the catalog, and it states that my catalog is being used in another application, but there is no application running that uses this catalog
Please Go to the Picture folder >> Lightroom folder >> and then look for the .Lock file
Delete the .Lock file and Open the Lightroom.
Let us know if that helps.
Praise jesus, halleleujah. pass out the shot glasses and start pouring the shots.....thank yoou so much, This worked like a charm