If you make a clean install onto another location on your computer and not where your old FH is located, it cannot really give you a crash upon startup unless it's due to the rendering mode selected being wrong, or that your computer itself cannot handle the game(Which shouldn't be the case if you have a computer from the recent 6 years and all drivers installed for it).
-Install FH to another location on your computer and not C:\FeralHeart which is the default.
-Do not install any modifications(mods) what so ever
-Start the game, and if it crashes, change the rendering mode inside ogre.cfg, it's the top line and can either be Direct3D9 or OpenGL Rendering Subsystem. Be sure to save the config after made changes, and also do make sure you edit the text file correctly(There's tutorials on doing this I believe)
Your game should then run as you install it to a location that has had no FH related files in it before, and you install it with the same installer everyone else uses.