Thanks to each of you for responding to my post!

When I installed 11.2 I DID select the option to retain my preferences. That is why I was so upset when ALL my library content was removed. Glad to hear this didn't happen to everybody.

I am still puzzled why the DIM no longer works for me. (I'm running W7 Pro 64 on an AMD X6 CPU system; maybe that's too old now but I really hate the idea of running W10 with all it's built-in spyware and app-breaking forced updates.) The DIM goes through all the normal stages of installing content from my DAZ account and reporting when each item is installed. But nothing shows up in the Poser library. Don't really need it anymore, though, to make the key DAZ characters work (V4, M4, Morphs++, etc.). As long as they are manually installed in C: Public Documents and I point Poser's Add-to-Library to them they work. All my other content is kept on another HDD and also backed-up on a third HDD to preserve them if one of the HDDs should fail.

Good info on the history of DAZ item folder structure. When the DIM worked correctly for me it ignored the Content folder during installation and the names showed up in the Library. Now that it doesn't work for me, at least I have the workaround now (eliminating the Content folder for each item) and eventually will get everything manually re-listed in the Poser Library. I certainly hope that Bondware doesn't force any more updates under the threat of Poser not working until the update is installed and then eliminating user preferences in the process.

Thanks again for your replies!