I did (ask John), post #14 in the thread you linked.
I'm not sure if Studio Instruments originally asked where to put the samples before or not.
It sure didn't when I installed it from the Command Center.
I know Rapture did not, Dim Pro did (previously).
Haven't tried either from Command Center, but both are already installed; so why would I?
I'm not sure Platinum is "ready" for the studio DAW yet.
I'm taking a "wait and see" attitude; I'll play with it here on the office rig a bit.
Needs to be "fixed" though; of that I am sure.
T