What happens? Describe in detail
Also, we need to know your operating system, and the version of Lightroom
When I click on the LR icon a screen opens, " LR Adobe Photoshop Lightroom - Select Catalog".
This page is blank.
I don't know how to get beyond this.
I have not gotten into LR for over a year.
PC W 10
Use the Windows search feature to search all hard disks for files whose name ends with .LRCAT. Double-click on each one found to open it in Lightroom.