Installed incorrect coreAudio driver and cannot uninstall

Question

I've done something very stupid... I was misinformed by a friend and installed COREaudio driver v8.03 on my 2.9GHZ macbook pro with 10.8.2 Mountain Lion. I installed COREaudio v8.03 and now Ableton live does not pick up midi signals and every time I open Ableton, I get a message telling me that "Required software extensions are missing" and clicking ok redirects me to an anti piracy website called www.paceap.com but from what I've read, Pace is essentially a nasty piece of malware disguised as anti piracy software and I have no desire to install this.
The obvious soloution would be just to uninstall the COREaudio driver, but I can't figure out how.  There is no uninstaller and the audio folder in library which should contain the COREaudio files is empty with the exception of a folder named 'Digidesign' but my mac won't let me delete it as it is a required file.
Any help as to how to either uninstall this version, revert back to the built in COREaudio driver that came with my mac or even a different driver that would work would be greatly appreciated. Thank you
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Answer 1

I have no way of knowing what you did, but you can either restore from the backup you made before wrecking your system, or do a clean reinstallation of OS X.
Back up all data to at least two different storage devices, if you haven't already done so. The backups can be made with Time Machine or with a mirroring tool such as Carbon Copy Cloner. Preferably both.
Boot into Recovery (command-R at startup), launch Disk Utility, and erase the startup volume with the default options.This operation will destroy all data on the volume, so you had be better be sure of your backups. Quit Disk Utility and install OS X. When you reboot, you'll be prompted to go through the initial setup process. That’s when you transfer the data from one of your backups. For details of how this works, see here:
Using Setup Assistant
Transfer only "Users" and "Settings" – not "Applications" or "Other files." Don't transfer the Guest account, if it was enabled on the old system.
Reinstall your third-party software cautiously. Self-contained applications that install into the Applications folder by drag-and-drop or download from the App Store are safe. Anything that comes packaged as an installer or that prompts for an administrator password is suspect, and you must test thoroughly after reinstalling each such item to make sure you haven't restored the problem.
Note: You need an always-on Ethernet or Wi-Fi connection to the Internet to use Recovery. It won’t work with USB or PPPoE modems, or with networks that require any kind of authentication other than a WPA or WPA2 Personal password.