I 'duplicated' a sketch as a backup to 'test' something in my main sketch. Once I was done, I deleted the primary sketch and renamed the 'duplicate'. Now it gives me "This sketch is no longer here".
Can my work be recovered? - ~2800 lines of code!
Sorry, I have no knowledge of the on line editor so can't be of any more help. Hopefully someone that knows that editor can help you to recover your code.