That's related to permissions (Bug reports)
Please run icomancer as administrator and try again. That error is related to something not allowing icomancer to touch a folder that is being protected by either the system or an antivirus.
Complete thread:
- System.NotSupportedException - Richard White, 2014-11-06, 13:28
- That's related to permissions - acaballero, 2014-11-06, 15:06