First of all, I want to apologize about my language mistakes (I'm not native) and say that I apreciate a lot all information and help that I got from you. It was very very useful for me. Now I have a really big issue. After an error, my programm crashed and when I opened it, after that, it appeared to me a window through I could restore the arrangement that I had made. I closed the window by accident, and after that I reset my computer (now I realize that I've been silly). Whatever.. The biggest problem now is the fact that I cannot upload my project (it gives me the error: ,,the file format... cannot be read by.."). I've also found a MM_ file extension, but I did not recover ALL the project. Is it possible to restore my arrangement as I would have done if I had used the restore window that had appeared firstly? Please help meeeeeee. I'm desperated. I had worked a looot. My biggest wish is to be as is was first of this disaster. What was changed to the arrangement that it gives me that error with the file format? The extension of the original project (not that with MM_) is MMM!!! I cannot understand. What is more, the original project (with MMM) has 403 kb and that one with MM_ 1.147 kb. I don't know where does this differenece come from, because in the MM_ back-up copy I don't have all the tracks that supposed to be saved even though I saved them before magix crashed.