A few notes on installing the tools…

If you have the Blend 4 Beta installed from MIX10:

 

Uninstall the Blend 4 Beta Phone Tools

Uninstall the Blend 4 Beta

Uninstall Windows Developer Tools CTP from MIX10

 

If you have the Blend 4 RC (4.0.20408.0) installed from Apr 15 Silverlight 4 RTM:

 

Uninstall the Blend 4 RC

If installed, uninstall Windows Developer Tools CTP from MIX10

 

Is that simple! Smiley