I want to try Thunderbird 67 beta version .
But after install It became another instance of thunderbird .
Old icons still open old version and New Icon not access to my email profile.
How can I install to replace old version?
I got it!! .
I update profiles.ini in %appdata%Roaming\Thunderbird
Look my old profile name in old app and set it to default .
And be are that there is now downgrade protection - making it more difficult to go back to an older version when using the same profile
Yes, I also think that it is more difficult to downgrade.
BTW I like this new version hope my user think the same.