Uninstall Plan3D...
Plan3D is an activeX control that is installed as a plug-in to Internet Explorer 6 or newer. This menu items allows you to remove the activeX controls.
Uninstall Menu
Open plan3D, choose "Uninstall" from the Help menu and you will be asked to restart your computer to complete the uninstall.
Manually Uninstall Plan3D
In Internet Explorer>Tools>Internet Options>Settings>View Objects
1. Delete the "PreCntrl Class"
2. Delete "Floorplanner Class"
3. Close ALL Internet Explorer windows.