For about two weeks now I have been trying to discover what is wrong with my Thunderbird. One day it just stopped loading and I would have to force quit the program. I reinstalled and reinstalled and reinstalled. I have finally found the where in the profile but I'm not sure how to fix it without losing my emails. After copying my old profile file by file I found that pref.js is the culprit. After copying that file into the new profile I get the hang. Here's the problem. I'm missing folders and emails until I copy this over. So I need to use a scalpel not a machete to fix this. I've printed out the Preference file but it's overwhelming and I'm not sure exactly where the problem lays. OS X v. 10.11.6 Fresh download of Thunderbird Do I need to attach the pref.js file for review or is this a known issue that someone can say find this and eradicate?