Reinstalling isn't the way to accomplish a "start over".
Just go into Lightroom, use File->New Catalog, and this will create a totally empty new catalog for you to work with.
I did that and nothing showed up on the Destination column. Over four thousand pictures have disappeared now. And I have no folders to relate to. Like Zero. I named the catalog as asked and it's nowhere to be found now.
My problem in the past has been folders in the right column and no folders in Destination.
Yes, I have now opened folders on the left column and have the catalog GD Catalog. It is empty. Sorry I'm so frustrated. I have been for two weeks.
Can you tell me if the Program is supposed to be in Application (alone) ?
If the Catalog Lightroom 5 Previews.lrdata and Lightroom 5 Catalog.lrcat can be in a second, external drive with Lightroom Photos ?
If the GD Catalog....lrcat and lrdata are supposed to be in the Lightroom Photos ?