Having applied latest update in NOF12 (showing as 12.00.0000.5220), existing e-commerce catalogs show as blank if opened & then closed. I have tried re-optimising, saving a template, installing NOF12 on a laptop that did not have NOF12 before (but had NOF11). Both desktop & laptop are Win7, 64-bit.

Existing catalogs are OK if not opened, but as soon as opened + closed, they become blank, as do new catalogs just added. The catalogs are there but blank when closed. What is happening here and what should I do?