Figured as much...its kind of a common answer and for exactly the reason you suggested...it is still in flux. Your experiments with Spartan, however, did work well so I will wait until official release. Thanks for answering.
CCleaner worked (and worked well) on Project Spartan thru Win 10 build 10130. But last week when 158,169 and finally 162 came out the named changed to Edge (as programmed) and CCleaner 5.07.5261 does not see Edge files. How soon before an update to encompass Edge cleaning?