Haven't used this myself - but have gotten good results from this with conversions of negatives provided to others who use it; pretty impressive . . . thanks for the share . . .
Here is a method to extend the trial to more than 12 negatives. 1. Setup trial NLP v3 2. Go to C:\Users\*username*\AppData\Roaming\Adobe\Lightroom\Preferences 3. Open file "Lightroom Classic CC 7 Preferences.agprefs" in notepad (make backup just in case) 4. Search for "photosAppliedV7" and change number = -999 (if you enter more than 1000, the plugin starts to crash) 5. Use "trial" NLP +Block NLP in your Firewall In any case, it is sufficient to bring the counter back to the maximum value every now and then so that it never resets and the plugin will work indefinitely!