>Someone will be sending me an MD5 Encrypted string for me to decrypt. I downloaded FoxCrypto and figure it out. Can anyone help?

MD5 is what is called a "hash". It is a one-way encryption. You can't decrypt.
It is used so you can compare two strings (like a password or some text), by applying the same hash. Both encrypted strings must match. That way you can test a password on a login screen, without actually decrypting the stored password.