[NTG-context] revert to an older install not working?

Dear list, after the missing file in the latest beta, I wanted to revert the installation back to previous beta (2013.07.14). I tried it with the following command: ./first-setup.sh --context=2013.07.14 But it gives the following error: rsync: change_dir "/current/context/2013.07.14" (in minimals) failed: No such file or directory (2) Am I missing something or revert to an older install is disabled? Many thanks for your help, Pablo -- http://www.ousia.tk