I have to agree with zebula8!!!
You MUST provide a free version, even if it is given 'as-is' and does not have any support or maintenance. No problem if it is version 4, 5 or 6!
No problem if it does not have Visual Studio integration. I'm quite sure the .NET community will not care about it. The community cares about the authoritarian decision to put such useful tool only to be available by paying!
That should be considered a crime!
I'm sad. I'm quite sure Lutz Roeder didn't wish to have his tool be rapped like this!
GIVE IT BACK to the COMMUNITY!