Problem with textures

[Poizonus]

I have a problem
I had designed the plan of a house in Sweet Home, a few days ago. The walls were already with their respective textures and colors, objects added. He had everything ready. And I kept

And the next day as he opened the plane and everything was normal. Until two days ago, I opened everything was flat and without texture. The walls were without texture and color the objects added gris.y came out in squares and a red X.

What is this? If you do not change anything.

[Puybaret]

What version do you use?
Did you transfer your file by email or a USB key?