Rated 1 out of 5 stars
As the development of the extension is suspended I provide the warning for its prospective users here.
The way the settings window of this extension works in Thunderbird 60.* is completely buggy. If someone uses the extension options button to open it then the displayed window cannot be closed: escape key doesn't work, there's no "close" button.
The window is centered on the screen and not movable. When another application window is activated then clicking the main Thunderbird window doesn't reactivate it - it's necessary to click ColumnsWizzard's options window first, then Thunderbird window. Fortunately, it's possible to close Thunderbird because while option windows can't be moved the main window can...