Sage help urgently please

[blindswelledrat]

fk fk fk fk.
I don't suppose anyone here knows there way around sage well enough to help.
I have just posted a couple of months worth of stuff and when trying to delete a started line I pressed 'discard' which deleted the fking lot.
I have googled and tried the helpline to no avail.
Is there an "undo discard" key?
An internet beer to anyone who can answer

Thanks

[blindswelledrat]

Don't worry. Just got through to support and there is no option to do that.