This is the third major release of the LUTEar Core Routines Library, version 2.0.9 . There have been various minor releases during the further development of the library, allowing sites to utilise new modules and hence help in the BETA testing of the of the new developments. It possible to use the new version of the CRL with test programs written for the older versions with very little change. This is possible because the backbone structure of the CRL has changed very little since the first release, and new developments have been mainly added on top of the old code. A summary of the few changes required to use old test routines with the new CRL is given in Appendix C.