Thunderbird

My Thunderbird v.139.0.1 crashed. It would not run at all. I downloaded Thunderbird and it was v.139.0.2. It looks entirely different and created a new profile. I edited the Profiles.ini and replaced the new profile with the old profile. (this worked 2 months ago when I bought a new computer). Now having done the editing to get all my old emails etc, it will not bring up the old profile. How do I get my old profile and the setup from the 139.0.1 look and feel. Thanks.....