Blender interface grayed out? i have both blender 2.78 and 2.70

the 2.78 version looks fine but for some reason 2.70 is grayed out

Does Anyone know why?

Thank you
I don't know why but if you want a normal interface again you can try this:
Open the user preferences and select themes 

After that, you can click Reset to Default Theme or choose one of the presets 
I hope that I could have helped you and if it is not going to work, please enter the blend file so that I can try a few things out.