Hello SEVENSUN, if you need to save a file from Mixpad temporarily to keep working on it later, you need to select the option "Save Project" located in the upper left hand side of the screen, is the diskette icon. Mixpad will save this file with an .MPDP extension and you are going to be able to open it later. We recommend you to save this file somewhere visible, like in your desktop. Once you save it, you should be able to see an icon for Mixpad with the name of the file you create.