Endnote Compatability Question

For the last few years I have been using Endnote 8 at work, and I have used this to build my library. Now that I am working at home I have Endnote 7, and I am trying to open my Endnote 8 file in version 7 only to be told that the file is not valid or made my an incompatible version of Endnote.

Is there a way to open my library? I’m really stuck if I can’t, I haven’t got the time to start again from scratch!