Oh come on, Dave Taylor!
Darn it. Honestly, the "Explode Viewport" functionality I've seen advertised in Platinum since version 19 is one of the major reasons I upgraded. So this is a disappointing discovery.
I'll try the Drafting Palette workaround, as the Hidden Line is what I want exploded the most. Renders I can save as a picture file and re-import.
Thanks for that advice.
....well. Its off to bed and maybe Branched Lofting will soothe my Exploded Viewport dismay......