﻿Are these IronPython crackmes unsolveable?

Written in IronPython, for the .NET platform.
Use tools that you would normally crack any .NET program with.

See my previous submission and give it a try, too.
This one is one that checks for a valid keyfile.
A "demo" keyfile is provided, but it won't unlock the crackme fully.

Unacceptable Solutions: None.

redbeansoup