I spent countless hours carefully placing components on my pcb.  This project has an external interface requiring extremely precise placement of buttons, holes, etc.  I was so careful to save after every minute alteration.  I exited EasyEDA to take a well deserved break, and when I opened it back up, nothing was left but an outline of my board and a lonely diode.  The diagram above the blank outline is an earlier attempt that I'd abandoned in favor of a new, fresh approach; but even that has many missing components.  What is the point of saving your work, if it gets ruined anyway.  I'll never get those hours back.