How to restore an activity file on Garmin Forerunner 230 watch after accidently deleting it? Please help.

Somehow I hit delete while trying to look at today's activity on my watch, then hit back button when it asked to confirm, but finger holding other side of watch must have confirmed deletion.  How do I restore and download deleted activity file?  It must still be on the watch somewhere.  When I try to download activities from my watch to my computer, it's not in the list.  Please help.