My PC won't let me open my Lightroom 5 because it says that another application is already open. I have only downloaded this Lightroom to the. PC laptop I'm using. I've tried restarting my computer twice. Please help.
Using Windows Explorer, go to the folder containing the LR catalog.
There will be a file with the extension .lock.
Delete this file. Do not delete anything else.
The catalog should now open.
Retrieving data ...