Grasshopper for Rhino 4.0 SR6

Hi,

I am desperatly looking for an old version of grasshopper which would work on Rhino 4.0 SR6.

Rhino had been installed on my computer by school technicians so I dont have the CD key to upgrade to newest version of Rhino.

I had a working version of grasshopper 2 weeks ago but I thought it would be clever to download the newest which doesn't work... not so clever after all

Please, can someone help me?!

Ariane O-P