Corrupted PNG File Help

[Firejoker54]

I've been working on one of my custom sprite projects when my computer suddently shut downed. Ever since, when I try to open the file, every program (Paint, Irfanview, Photoshop, etc) I try can't open the sprite sheet and states that it's an unknown file format. I did use a few image repair programs with no avail. I worked for this on and off for a few months so I'd rather not have to remake everything from scratch... Can any of you tech savvy people help me? I'd be really greatful if so.
http://www.mediafire.com/file/44em2657j4...covery.png
I should really start to make backups of my sprites