Hi. Directory Opus 11, latest version. I use it on two PCs. On my desktop PC, it's fine. On my laptop, the file association for .jpg images (and presumably others) is never retained. I am allowed to select my program of preference (Faststone Image viewer), and it opens the image the first time, but if you then close the image and double-click another image in a directory, it defaults back to the default Microsoft image viewer.
Driving me crazy. On 64 bit Windows on both machines, all up to date.