I have upgraded my system to KALI Sana 2.0 and kernel 4.0.0-Kali1-amd64. Previously I had the version kali-linux 1.1.0 and kernel 3.18-Kali1-amd64. The reason I want to downgrade is that Kali Sana 2.0 is giving me too many problems and doesn't launch the GUI. Please do not tell me to install a fresh version of Kali as I don't want to lose the data and Apps.
Please help me to downgrade my system to kali-linux 1.1.0 and kernel 3.18-Kali1-amd64.