Rated 2 out of 5 stars
I don't mean to minimize the author's work, but it's pretty useless to me. I have many subfolders in my 4 inboxes, some of them important, some of them not. "Only count Inboxes" is simply not usable. The way it should have been done from the very beginning is scanning all active accounts for the whole folder hierarchy and allow the user to un/check each individual folder.
And remove the hardcoded colors on the options page, the text is not visible on white-on-dark color schemes. It should follow Thunderbird's colors.