Thunderbird questions

Chuck <[email protected]>
Newsgroups gmane.comp.mozilla.devel.prefs
Message-ID <[email protected]> 
I just switched to Thunderbird.

I want to be able to save preferences.  I followed the directions to 
create a user.js file in my profile directory. I assumed it is a text 
doc, which I will add and save preferences.  However, now that it has 
the .js extension, it is listed as a java script file in Win XP and I 
cannot open it to add any preferences.  What am I doing wrong?  Any 
suggestions?
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