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"side by side configuration" error message then Thunderbird looks different and creates a new, empty profile

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  • Last reply by Matt

RCK
RCK
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Attempting to start Thunderbird from the taskbar today resulted in a "side by side configuration" error message. I then saw that Thunderbird in the Start menu is marked "New". Running it resulted in a new, dark-themed Thunderbird with an empty profile. I have created a third, new profile and copied all of the original profile onto it. Things seem to be working, but I wonder what happened.

Attempting to start Thunderbird from the taskbar today resulted in a "side by side configuration" error message. I then saw that Thunderbird in the Start menu is marked "New". Running it resulted in a new, dark-themed Thunderbird with an empty profile. I have created a third, new profile and copied all of the original profile onto it. Things seem to be working, but I wonder what happened.

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Matt
Matt
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  • Top 10 Contributor
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just a guess.... https://thunderbirdtweaks.blogspot.com/2019/09/i-lost-my-profilemail-on-update-to.html