hi frank.
sounds a bit odd.
i don't really know what's happening there, either.
in my droplets, "Cluster" is not greyed out, but i only have the one option: This Computer.
not so surprising as i don't have any clusters set up,
and right now i've only got the one computer turned on.
i notice in compressor that the Cluster pulldown (bottom left) has a lock next to it.
the lock is greyed out in mine.
maybe you've locked yours somehow?
(i'm really grasping at straws here!)
if everything is working correctly, though, i guess it's not a real problem?
all the best,
nick