Jesi quick question for you. When it came to deleting your game did you Delete it by clicking on the FH folder and clicking the delete button?
Or did you go inside the folder and click on the uninstall application?
If its the first. Your not really supposed to delete games that way. They dont fully remove the game files and it could cause more problems for you that way.
If you clicked the uninstall application then it should automatically do it properly for you. The way its meant to be taken off your computer.
However have you considered not using DirectX and using openGL.Test it out to see if it will fix the problem. To do this simply follow these instructions (only do it this way if you cant get the box to show when FH starts.) :
1) go into your FH folder. You should see exports/media/my_presets/presets ect
2) Scroll down and look for a file called ogre.CFG file. Open it with notepad or anyother word program.
3) When it opens you should see something quite like this.(however since our pc's are different the resolution and graphics card will be different.) :
Render System=Direct3D9 Rendering Subsystem
[Direct3D9 Rendering Subsystem]
Allow NVPerfHUD=No
FSAA=0
Floating-point mode=Fastest
Full Screen=Yes
Rendering Device=Monitor-1-AMD Radeon HD 6700 Series
Resource Creation Policy=Create on all devices
VSync=No
VSync Interval=1
Video Mode=1440 x 900 @ 32-bit colour
sRGB Gamma Conversion=No
[OpenGL Rendering Subsystem]
Colour Depth=32
Display Frequency=N/A
FSAA=0
Full Screen=No
RTT Preferred Mode=FBO
VSync=No
VSync Interval=1
Video Mode=800 x 600
sRGB Gamma Conversion=No
4) The top Line needs to be replaced with OpenGL Rendering Subsystem
The topline should look like this
Render System=OpenGL Rendering Subsystem