Thanks to all!
I tried to run CW, and it actually runs. Or at least it starts up, I don't know if it runs yet.
It's just that all the icons for CW 64-bit are missing, regardless of wether it's the actual app, or shortcuts...
The only things that i changed recently on my PC are an update for my graphics card driver (ATI HD4700 X2)+upgrading to CCC 2.0, the raised my monitor refresh rate from 60 to 75 Hz (which I tried to set back to 60 to see if it was the cause. It wasn't.). And I also defragmented my hard drive. None of these things should be the cause. I think.
I also tried to uninstall then reinstall and then to replace my files, but it didn't do anything. Either before or after I replaced my files.
Thanks again for all the help! Hopefully it will right itself...