When does FH tend to crash? Right when you execute it or after logging in, or..?
Here's some things you could try. Users above have covered some of these, but just making sure. ^^
>> COMPLETELY removing the file: 'ThisPC>>LocalDisk(C:)>>FeralHeart (Or wherever you saved FH to during installation. But the location mentioned is default)
Like this. You'd be removing the grayed-in file:
>> Ensure that you have all the needed .dll files in your FH folder. They are:
>> Here's a screenshot of my untouched, working FH Main folder. If you see a difference, let me know.
>> Make sure that, when you start up FH, you select 'Direct3D9' and not 'OpenGL' as your rendering system. The enging FH uses doesn't like OpenGL. Try to avoid that all together for things running on Ogre.
>> Run FH as an Administrator.
Let me know if these help, and when FH crashed for you.