I recently had an external hard drive failure and replaced it with another drive. Since then, I have not been able to get LR CC to launch properly. It won't allow me to create a new catalog or to view or change any of the preferences. Clicking on 'New Catalog' or 'Preferences' does absolutely nothing. I have uninstalled Lightroom, deleted all of the preference files, downloaded and reinstalled, rebooted, and launched while pressing Option+Shift to reset all of the preferences. None of this helps. I also have Photoshop cc installed, which launches and runs without issue.
My system is a Mac mini with both an SSD and an internal drive, plus an external drive. I am running OSX 10.11.6 and Lightroom CC 2015.10.1.
Any help appreciated.
Thanks for the suggestion, but it didn't help at all.