Uninstall Before Reinstalling Uninstall Before Reinstalling Before re-installing a custom shader, you must first uninstall it. XSI kindly reminds you of this, should you happen to forget. % ./make.sh -f makefile.linux uninstall Or % ./make.sh -f makefile.irix uninstall Or for Cygwin % cd cygwin % ./make.sh uninstall It's recommended that you use XSI via batch mode to remove the add-on rather than just walking the directory tree and deleting files.