I got a new computer which does not have a disc drive. WHen I transferred LIghtroom 5 to my new imac from Time Machine of my former imac, it no longer works. I have looked at the support documents and tried everything it aksed me to do. I have to put in my serial number everytime I click on anything, and it gives me an error message regarding changing modules fail. I have shut down the computer, I have reinstalled, I have given permissions in preferences. Please, any suggestions would be very much appreciated.
I would suggest you to please trash Lightroom , and then reinstall it from the following link : Install Photoshop Lightroom
As it is not recommended to install the application from Time Machine.
Once done , then please go ahead and put in the Serial number.
Let me know if you still get the error.