Using this version:
Version: 3.5.15 - 10/16/2017 10:39
Adobe Air Player Version: MAC 23,0,0,162
The scrolling in the side panel (Mockups) super-sensitive with a Mac Magic Mouse. I barely touch the mouse and the side panel will scroll 10+ panels (up or down). Please change this scroll more slowly … much more slowly, as I have to keep the mouse cursor out that window entirely or I lose my place.
I am at the point where I gently click into the selected panel and the use the arrow keys to navigate up or down.