In Options | Editor | Formatter - Custom tab the panel with the tree, the nodes cannot be opened and closed properly and the vertical scroll bar does not display if the list is longer then the window.
With a new install or a fresh profile settings, the nodes and scroll bar seem to work, but the issue comes back later. Resetting the Toad options all the time is not an option since each time, personal configurations for the settings are also reset, and the issue still comes back.
WORKAROUND:
Open/close the very top node in the tree. Then the other nodes will work properly, and the scroll bar will display as needed.
STATUS:
Waiting for fix in a future version of Toad for SQL Server.
