You can keep your original game and there's not much work in getting what you need back.
The n1 easiest thing to do would go into your recycle bin(unless you mean you removed the things from ingame), and just locate the files you removed and right click, and select restore, this will throw your files right back where they were.
The second thing you can do, is just that if you have any installer for FH laying around in your download folder, just run that and install another copy of FH to another Location on your computer like C:\extraFH\FeralHeart. And then just snatch whatever files that you need. This way you wont even touch your old game and it's included mods or downloads.
Even if you download the game from here, it would eventually go faster and less effort would be needed on your part.
