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It needs detailed information on what it supposedly does and how to use it.

这个评论是针对附加组件的一个早期版本的(1.2.0)。 

the "fonf" - button activates the function as in the menu "Tools" - "Runs Filters on Folder".
it's easier to reach the function with that button.

the "Filter" - button only opens the "Message Filter" dialog, where you can handle your message filter.

评分1星,满分5星

Unfortunately, this does not seem to do anything in Win 10 with the latest Thunderbird. It will open the filters file but it will not run any filters.

这个评论是针对附加组件的一个早期版本的(1.2.0)。