Hi! This JDög from Spain,
Some days ago I had to re-format my computer. I made a securitu copy of All my Cubase 7 Elements Projects in an external Disc. Now I try to open them and I can only use the VST tracks. The AUDIO TRACKS are ERASED!!! But I can see the “empty” tracks. I try to open them choosing the folder in the pool, but the answer is “Invalid File”
Could anybody help me please!!! 
Thank You Very Much!!!
JDög