I was getting a compile error, so I relaunched and the code is gone. Like nothing at all, not even the default classes. I assume it tried to save when I closed the IDE (despite there not being any dialog boxes) and corrupted the file :/ the ino file still exists, but it is now empty (0 bytes). I also tried looking at the compiling folder in %appdata%/local/temp, but it was empty. I have very little space on my C drive, so that may be why, but I am extremely frustrated after losing my school project.