AllainU, thanks for replying. 1. this issue has been happening since I purchased it in July(?), maybe August, from initial install.  2. 12.16.3.524 and it was from a downloaded test install from Nitro's website. I do not know if this is the version I first installed, i did try to uninstall and reinstall recently. 3. Yes, it crashes with a variety of files from multiple sources. Word docs exported, downloaded PDFs, pretty much everything but not with every PDF. Sometimes it will pr