Do you mean to say you want to erase all images imported in Lightroom and start fresh with an empty catalog?
Did not get your last response.
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I hope that you receive this - I'm new at this,
Am not sure how many times I can reenstall LR 5, that is why I do not want to delete and start over.
Answer to your original reply "yes"
thank you for your intrest
You do not need to reinstall Lightroom in this case.
If you want to start fresh with an empty catalog, just go to File menu > New Catalog > give it a name > choose Create > Relaunch
Thank you Chetna, probem solved