C'est un duplicate of: Arrange windows within the same application in the taskbar of Windows 7
The answer listed il y a to installer "7 Taskbar Tweaker" from ici: 7Taskbar Tweaker
J'étais hesitant to installer quelque chose homebrew like this, but to my surprise - it En fait Works!
Vous pouvez reorder the thumbnails by checking the box "Drag to reorder" under the "Thumbnails" section in 7 Taskbar Tweaker. It fonctionne maintenant like it should!
If vous n'avez pas want to use that approach (which requires the programme to be running dans le background all the time), ensuite just launch Taskbar Tweaker when you need it and vous pouvez click the "Taskbar Inspector" bouton and drag around instances of your app inside du app group and they will move in realtime.