The vfdecrypt for Windows requires libeay32.dll to work properly. Use google to get a copy of it.
For firmware 1.1.2:
Syntax: vfdecrypt112.exe 022-3725-1.dmg decrypted112.dmg
Download: vfdecrypt for 1.1.2
For firmware 1.1.1:
Syntax: vfdecrypt111.exe 022-3602-17.dmg decrypted111.dmg
Download: vfdecrypt for 1.1.1
For firmware 1.0.2:
Syntax: vfdecrypt102.exe 694-5298-5.dmg decrypted102.dmg
Download: vfdecrypt for 1.0.2
For firmware 1.0.1 (1C25):
Syntax: vfdecrypt101.exe 694-5281-6.dmg decrypted101.dmg
Download: vfdecrypt for 1.0.1
Note: vfdecrypt101 seems not work with 1C25, in which case use vfdecrypt102 instead.

One Comment
Please post for 1.1.4
TANX