That's related to permissions (Bug reports)
All icomancer files are stored into the %appdata% folder... it is a common issue that Windows UAC or antivirus programs prevent icomancer to access its own files because it is no a signed application.
One of the ways to avoid this is by running icomancer as administrator -even if you have an administration account- or whitelist it on your antivirus.
Please try this and let me know if it helps.
Complete thread:
- Error trying to assign folder icon - Richard White, 2014-05-22, 19:44
- That's related to permissions - acaballero, 2014-05-22, 21:14