Since, those images are already present in your catalog, you do not need to re-import them.
Go to the Library module in your catalog> look for that specific folder under folders panel and start working on those images.
Or, click on All Photographs under catalog panel in Library module and scroll down to look for those images > select an image > go to develop module to start editing.
Let us know if you have any further queries.
1 person found this helpful
You've hidden the left hand panel, which is where you'll find the Folders and Collections panels. Click on the arrowhead half way down the extreme left edge of the Lightroom window (or hit F7) to restore the panel.
Nothing will happen when you click on Library, as you're already in the Library module.
Aaah, thank you - life saver!!!