Crystal Clear Interface - Mac OS X GUI corrupted.

Hello everyone, I'm using a 21.5" iMac(Late 2011 intel model) running Mac osx lion(10.7.3). I was bored with the gui so I downloaded and installed "Crystal clear interface" from some website. It was a 15 day trial version. After installing, I realized it was an old version, and meant only for the Mac OS X Leopard. My scroll bar was very weird. It had a bunch of apple logos, and not clearly visible too. And also, the three buttons on the left corner(the resize, minimize and close buttons) have vanished. They are not seen, but they exist. I approximate their location and use it sometimes. I use all shortcuts now because of it. 😐 Anyway, after I tried uninstalling it, it says it's done uninstalling, and tells me to logout. After I login again, it's still the same. I guess it replaces the mac osx core files with it's theme packages. So I opened library and searched for all folder containing crystal clear interface and tried messing around with it. I deleted all files and folders, but even then it's still the same. I am currently stuck with this. I visited the official website, and tried downloading the latest version. When I tried to install, it says it's only for mac osx lion 10.7.4(I use 10.7.3) and mountain lion. So I tried updating my lion to 10.7.3 and it didn't update successfully many times. Once it downloaded a full 720mb and later it said 'none of the updates could be installed' and gave me some error. So I am totally frustrated with this right now. If anybody can tell me what to do, it would be great. And also, I'll be updating to mountain lion soon, but I just wanted to get rid of this problem anyway before that. If required, I can post a screenshot of how screwed up it looks. I also wanted to totally reinstall lion, but when I tried that, it says it's downloading the required files and shows 72 hours remaining. I didn't have the patience to download so much so I cancelled it. I don't care about data loss, I have a complete backup of every data I want on my portable hdd, so I don't mind losing data. If anyone could suggest me any possible way, that would be awesome! 😝