Personally, I have found Poser 8's refresh a bit... hit and miss, Bagginsbill. I installed a product yesterday to my M4 runtime, and it took about 3 refreshes in order to get it to show. (Actually, because the product was called a "refit" I was getting concerned that it was just a pose file, not a figure.)

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Hardware: AMD Ryzen 9 3900X/MSI MAG570 Tomahawk X570/Zotac Geforce GTX 1650 Super 4GB/32GB OLOy RAM

Software: Windows 10 Professional/Poser Pro 11/Photoshop/Postworkshop 3