PROBLEM: Windower crashes to desktop. Returning 2018 player here, who was experiencing a crash to desktop (CTD) when I would try to open a second Final Fantasy XI (FFXI) Windower session.
SOLUTION: Disable screen dimming. Appears that screen dimming by the Windows 10 (win10) User Account Control (UAC) causes Windower to crash.
Do not dim my desktop link.