OK, so here's an odd thing; I forgot to change back to my original TesV.exe before I logged on to Steam. When I realized my mistake I closed Steam & went to the Skyrim folder & found that the patched version was gone; only my backed up original was there. And since Steam thinks that I already downloaded the patch I had to verify my install so that the patch would re-download.
So, just to test it out I played with the updated version & crashed to desktop within 10 minutes, after 2 crash-free days of playing with the 4gb patched version. Glad I kept a copy of my patched file

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