Please go to the location where the Lightroom catalog is saved and delete the file .LOCK.
Once done try and launch Lightroom and see if it works.
I looked at the file and there is no file that has .LOCK, unless I am looking in the wrong spot.
You need to navigate to the location of the Lightroom catalog and check there.
Do I go to Programs or some place else?
If you have not changed the location of the catalog, then the catalog should be in the default location, that is Pictures folder.