Your Lightroom installation is fine. You have a misconception about how it works.
Your misconception is this: You don't want to process photos and then somehow get them back into Lightroom again. They are already imported into Lightroom, you simply find the photos in the Lightroom Library Module and then continue editing or perform other operations on them. In other words ... there is no need to "Open" the photos somehow, and there is no need to import the photos again, the photos are still in Lightroom ready for you to use.
Thanks! I feel a right dope but I'm grateful for your speedy reply. I wish You lived next door to guide me through the learning process. Merry Christmas and thanks again.
Please take the time to view or read beginner tutorials about Lightroon. Your investment of time in these tutorials will be rewarded.