Before you reinstall, download this: Feralheart Media Folder (http://www.mediafire.com/download/2h3551xrc43cb5o/media.zip) (source: (click me (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=44252.0) )
Go into Media > materials and copy all of the material files in there to your Feralheart's material files (located in C:/Feralheart/media/materials) and replace the already-existing ones with those new ones. Also, try putting the default fur textures from here: (click me) (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=34682.msg476944#msg476944) into Feralheart/media/textures and click replace. After that, try replacing the Feralheart markings.cfg file with the one from here: (click me) (http://www.mediafire.com/download/a4i5k74f7vcu6rv/FeralHeart_DEFAULT.zip) Source above. Replace the markings.cfg file located in C:/Feralheart with that new one.
If you would rather not do all of that, you could try changing your rendering system, but if that doesn't work just reinstall.