Hello,
I think there is still a bug (433961) in the XDC platform wizzard and platform selection in the build options.
I have installed CCSv5.5 and CCSv6.0 in separate folder. With CCSv5.5 I can select my custom platforms in the build options placed in my separate folder and I can also edit this platforms with the platform wizzard.
With CCSv6.0 it doesn't work, because the platform are not found. I have tested this with XDC 3.24.03.33 and the newest XDC 3.30.02.44.
Thanks, Milan