Hi, Theresa
Well, you could try going
here and downloading your preferred older version. Then uninstall the present version (5.0) being sure NOT to have it remove profiles. Then install the older one you like. (You may want to
back up T-Bird just in case something goes wrong.) Be advised I'm not a tech guy. I've done this for myself in the past (though I don't use T-Bird these days) but I wouldn't want to give anyone else the impression that I
really know what I'm talking about.