Regrettably, the item you've purchased contains embedded geometry in a prop format. To manipulate individual objects, you must first extract the geometry, rename each object, and then re-import them into Poser. As this function is not native to Poser, and considering the item was created in 2017, support may be unlikely. The only solution is to employ a geometry stripper to separate the object. A free tool is available for download at a specified website. https://www.vanishingpoint.biz/freeitemdetail.asp?FreeItemID=421