I did, I find Win 8 uncluttered compared to Win 10. I've found 21PP 64 and 2015PP 64 to be more prone to crashing than V17, which I use a lot. I've had crashes not only with files from 32-bit versions, it hadn't occurred to me that that might be a reason, because it's also crashed interopping obj for subD modelling and .sat too. My own hunch was that inserted pictures might play a part. Microsoft's site gives two 64-bit packs one 6.3Mb, one 3 Mb. The 6.3Mb one wouldn't run on my laptop, saying my CPU's incompatible (Celeron), the 3 Mb did take.