of course you need select items first, to find material files (I think you do not miss it)
then actually some products in daz shop (not rare) come with wrong meta-data.
they sometimes forget to declare as item, sometime mistake compatibility base, or compatibility with,
sometimes just make products category, but forget to grouping.
though they have meta-data,,
so you need to check the updated topic, then compare your version,
and install the new version again.
but sometimes they version up for other purpose not to remove the meta-data problem.
(and sometimes they do not change version, just correct it, and do not tell officialy
we can check easily)
if the bug report has been send , they will or have corrected it.
so you find it first install new version, then if it will not correct,
I hope you send bug report.
there seems more products which missed meta-data.