Since I update frequently I had the same problem. I used Cypress update manager to de-install all versions and then re-installed Creator 3.3 again.
I also had this problem after upgrading to Windows 10. I saw PSoC Creator 3.2 and 3.3 in the All Apps >> Cypress launch column. I right clicked on the older version and selected Uninstall. Before doing this you might want to select Open File Location just to see if it's there and where it is. Of course you can also use the old method via Control Panel but this seems to leave the old version listed in the launch column. If its phantom shadow still appears there, right click and uninstall it.