A Pressing Need (Achievement #17 = 5 points + bonus points to be determined)

It was a day like today

when my words went astray

fingers blundered when I needed them most

Too important to lose

I suffered the blues

My future surely was toast

Then as the hours unwound

an idea was found

the solution at last diagnosed

For my file to appear

the answer was clear

resting on the row uppermost

What is it?

And remember, I get points for each wrong answer in the comments so let's not think too hard. :P)