Just another point.
After to have installed the MCU v10.6.4 on new folder (you can keep the older versions too), when you will launch Eclipse, after some time the system will propose you to download and install automatically the patch.
If it's not the case you can check it via Help + Install New Software ...
At field Work with select
FSL MCU Eclipse Update Site - http://freescale.com/lgfiles/updates/Eclipse/MCU10_6_4/com.freescale.mcu.updatesite

If you've problem let me know.
Have a great day,
Pascal
Freescale Technical Support
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