Hello Alesi
I guess you installed Inventor 2012?!
In the installation register from InventorCAM there is folder called SolidCAM and in there the folder IV.
In that folder you will find the "Uninstall 2010.bat" and the "Install.bat.
First of all double click onto "Uninstall 2010.bat". Afterwards carry out "Install.bat" with another double click.
Now you should have InventorCAM 2011 in front of the Inventor in your menu and InventorCAM 2010 should be gone.
Have a nice evening
M.Stockman