Re: "The LR catalog named LR5 catalog cannot be opened because another application has it opened."

I did understand the integrity of file folder (LR) extensions. I deleted the folder for LR3 because when the conflict window came up it showed the option to select a catalog from LR3 or LR5. The annoying popup window started when I downloaded an update from the CC. I guess I'll just wait for another update to see if that corrects the problem. Thanks for your suggestions.