From the WOFF FAQ file:
19) Cannot Get to Fly, I see error “WOFF DLL did not start or WOFF DLL runtime
crash!” (also see section 40 if you are a WOFF Expansion user!).
Exit WOFF, and open in Mission.log in C:\OBDSoftware\WOFF\Logs folder.
(Use Notepad or similar text viewer) to open it …
… Then scroll to the bottom.
If you see;
2013/12/17 06:35:17 EXCEPTION InitDXForWindow failed
2013/12/17 06:35:17 TellUser InitDXForWindow failed
Then you must set your Windows desktop to use the ‘native’ resolution of the monitor. Next also go to
‘Workshops’ menu in WOFF, and under ‘Graphics and Details’ section set your Resolution to the same
resolution setting as your desktop. In other words, the Windows desktop resolution and your WOFF
resolution must both match the native resolution of your display.
The ‘native’ resolution of your monitor is usually the maximum resolution it supports. Check the display
manufacturer’s website for your model of Monitor/TV/Display.
To set your windows display resolution, right click on an empty area of Windows desktop, click screen
resolution
In resolution choose the recommended maximum your monitor will allow.
Some TV/Monitors do not properly support 32 bit mode or do not report it correctly so if this still doesn’t
work try 16 bit mode in the Graphics Settings. If you still have problems see Section 40 if you are a
WOFF Expansion user. If not see other sections in this FAQ, such as General Troubleshooting at the end of
the FAQ, or section 17 for reinstall advice and other important information.