This release is supposed to be compatible with CMSimple_XH 1.7. See the changelog for details. If you are already using Keymaster_XH 1.0.1 use Keymaster_XH-1.1-update-from-1.0.1.zip which will not override any config, language or data files. Otherwise use Keymaster_XH-1.1.zip. Support is available in the CMSimple_XH Forum.