You have already installed Instant Housecall, uninstalled and re-installed, but your new branded icon isn't showing the updated icon.
Windows caches desktop icons.
Force Windows to re-load the icon cache:
- Right-click desktop, choose View
- Change the icon size
- Right-click desktop, choose Properties
- Click Appearance (tab), Effects
- If "Use large icons" is checked, uncheck it. If unchecked, check it.
- Click OK, then Apply