dscrypt error

Hello everyone,
I appreciate your help in advance.. Like so many others, I tried "dsCrypt.exe" to encrypt one of my file.. Stupid enough that I tried it on a file that I regularly use. But now when I try to decrypt it, it says, "The data is invalid" and that's it.

I can't get it back and it's a life & death situation. I have to get that file back.. Does anyone know, what's causing that error? I read thru "info" section and it says "A verified password is indicated by the yellow backgroun". But my decryption fails..

Please help me..
Thanks,
J