I am using a Logitech wireless mouse M360. When scrolling in the calendar, one or two clicks of the wheel will advance the calendar one or more years when I am in the monthly calendar mode. I just want it to do a slow scroll similar to what I can do with Microsoft Calendar where one wheel click is one week when I am in the monthly calendar mode. I am using the Smoothwheel (AMO) add on, but it does not help. Using the calendar in Thuderbird is impossible with this rapid and crazy scrolling with the mouse wheel. My mouse works great, including the wheel, for my browsers, Microsoft Office applications and other programs I use. I am using Thunderbird 45.0 which is the current version.