If you've purchased an EastWest/Quantum Leap product (their excellent Symphonic Choirs, for instance) and have experienced so many crashes that you have no more authorizations left, don't panic. If you plan on reinstalling your EWQL product on the same machine, launch the Registration Tool located at MacHD > Applications > Eastwest > YOUR EWQLSO Product and write down the authorization code. Your system ID will not change by merely uninstalling your product and reinstalling it.

To uninstall any EWQL product from your Mac, you must delete the following files (Note that "EWQL" has been substituted for a specific product name):

MacHD > Applications > Eastwest > EWQL folder

MacHD > Library > Application Support > Digidesign > Plugins > EWQL

MacHD > Library > Audio > Plugins > Components > EWQL.component

MacHD > Library > Audio > Plugins > VST > EWQL.vst

MacHD > Library > Preferences > /EWQL.plist

MacHD > User (Your User Name) > Library > Preferences > com.native-instruments.EWQL.plist

MacHD > User (Your User Name) > Library > Preferences > EWQL.plist

Please note these .plist files may not all be present for your product. However, you will have at least one .plist for your product in MacHD > User (Your User Name > Library > Preferences

After deleting these files, empty the trash. If you still cannot install and authorize your library, contact Native Instruments about getting a new serial number. You'll need to fill out a form describing the problem.