Could you please check and let me know if you have installed the latest update for Lightroom, Lightroom 4.4.1
Also which operating system are you working on , Windows or MAC ?
Hi Tanuj Sandal,
My operating system is Mac OS X 10.9.5.
In Lightroom 4.4. It asks my license. After I write my serial number, it accepts it but don't open the program.
In Lightroom 4.4.1. I write my serial number and open the program. But i get an error message on screen " An error occurred when attempting to change modules."
I would suggest you to remove the older version, Lightroom 4.4 from the computer and keep Lightroom 4.4.1 on your computer.
Also please check the following link for the error that you are getting : Troubleshooting guide for errors that can occur when you change modules in Lightroom
You are Welcome, Glad to help.