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I installed Thunderbird on Windows 10 in 2019, but since then, it started wasting computational resources when idle and I resorted to creating a new profile a few months ago hoping to solve these performance issues. I am now on Windows 11 which changed a bit since Windows 10.

PNG files are no longer associated with any program. My Thunderbird 115.15.0 does not offer to associate with a large number of options, but most are terrible (LibreOffice Draw, Adobe Acrobat) and some even worse (Thunderbird, Wordpad). Thunderbird used to offer a cryptic option called TWINUI which would handle images in a sensible program, but it is no longer offered here. Meanwhile, Windows 11 has migrated to Microsoft Photos, which replaced Windows Photo Viewer, but apparently cannot be launched from any application anymore since it cannot be called from a stable path such as C:\Windows\System32\calc.exe.

So:

  1. Is it normal that TWINUI is no longer offered?
  2. Is there no way to set a more sensible PNG handler than Microsoft Paint without installing additional software or going to lengths as great as hacking the Windows registry?
  3. If the answer to #2 is negative, am I doing something wrong or missing something here? I've been using Thunderbird on Windows for 20 years and have never seen it that bad. Is this Microsoft subtly using a monopolistic position to discourage third-party developers? Are we going backwards or is this an unintentional regression?
Rohit Gupta
  • 5,096
Philippe Cloutier
  • 302

1 Answers1

1

Apart from linking an extension to an application on Windows, you can also associate an application with a file type in Thunderbird.

Look for Files & Attachments in Settings

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The application you want to use, must already be associated with that file type in Windows.

Rohit Gupta
  • 5,096