All you need to do is flash superuser in recovery if your going to stay stock,Or flash a custom rom which will be rooted. Beings your bootloader is still unlocked you might need to install a custom recovery again to do thisI manually updated a rooted htc 4g evo yesterday and it says its still unlocked but it seems like its not rooted when i try to run the wifi tether. Im not really good at this stuff so if someone can please help me fix this step by step would be awesome..