I have managed to lose my NLP hotkey / keyboard shortcut while adding other custom keyboard shortcuts in Mac Preferences.
When attempting to add the ‘control-n’ shortcut again in preferences, it assigns the shortcut to the NLP extension header, not the menu item that actually opens NLP for use.

Any ideas how to rectify this?
Thanks!
Your system settings (keyboard module) should look like this:
Please enter " Negative Lab Pro" with three leading blancs!
You can also check if ~/Library/Preferences/com.adobe.LightroomClassicCC7.plist (or whatever the name might be on your Mac) contains the necessary entries. For this you’d want a .plist editor. You can get these in the appstore. TextEdit works for finding the entry, but I’d not edit the file with it.
Such a simple solution! Thank you!
And another thank you, albeit 18 months later. I added ^H as a hotkey to flip horizontal and as a result ^N stopped working. Three spaces saves the day 