Hi @iancawood
A few things to try (in order) to figure out what has gone wrong:
- Try resetting your Lightroom preferences. After you reset your preferences, you will need to go back into “file > plugin manager” and add back in the “NegativeLabPro.lrplugin” plugin. If there is an issue with metadata or conflict with another plugin, this should clear it out.
- Try restarting Lightroom Classic, and importing completely “fresh”, untouched negatives. See if Negative Lab Pro will work properly on those fresh negatives. If that works, there could be a metadata issue with the existing conversions.
- If that still doesn’t work, try creating a new catalog in Lightroom, then add fresh negatives, and see if those convert.
Let me know if any of those enable you to open NLP.
-Nate