What happens when you try?
What operating system do you use?
How much RAM?
Are there any error messages?
Have you installed the program?
Have you entered the serial number for the program?
Windows 7. It has previously opened and worked before and I have not changed anything. I'm at a total loss.
When I click open it does absolutely nothing. Weird huh?
Sent from my Verizon Wireless 4G LTE smartphone
Something to try. I have no idea if it will do anything. Using Windows Explorer, open the Lightroom folder that is in your pictures folder. Locate the catalog file, it has the extension .lrcat. Try double-clicking on that file and see if Lightroom will start.