I installed the xfce GUI following the instructions here:> ( https://wiki.amahi.org/index.php/GUI_In ... press_Disc) and now my system will not start it just sits at the _ prompt and does nothing

Is there a way to undo the installation or point to the mulit-user text interface again?
I have access to the files with a Ubuntu 14.04 LTS installation on the same machine (different drive).
Or do I need to reinstall Amahi 7?
Any help is welcome,
Thanks,
Bob