add the ability to decrypt "CRYPTEDBINFILE" parts of an export file

[PeterPawn]

• it's an outstanding ToDo
• probably add this only to the C solution, because it takes too much time using shell commands only; the hex2bin (and vs.) conversion is very expensive

[PeterPawn]

https://github.com/PeterPawn/decode_passwords/commit/044802482596dd10f6dc30c2fbbd9d45ac966773