I’ve followed this discussion but held off posting because I (1) haven’t posted before, and (2) thought the matter would resolve itself, which it seems to be doing. Nonetheless, I am now providing insight that may alleviate lingering concerns. The issue McG and others alluded to arose in version 12.0.396. Prior to that (including Poser 11), the library would return to its default settings if Poser crashed (for me, this occurred mainly during Firefly renders). If Poser closed out normally, the library retained custom setting upon relaunch.

For reference, I used an external library (Microsoft Edge) in Poser 11, which did not experience these problems. As that option appears unavailable in Poser 12, I have the Poser library floating on a second monitor.

Beginning with 12.0.396, the library returned to its default settings regardless of whether it previously closed properly. When that continued in 12.0.427, I submitted a support ticket (thanks to hborre providing the hyperlink). I did this late in the day (US Mountain Twilight Zone). The very next morning, I received an EML from Support saying the issue would be addressed in an upcoming update. Support asked whether the issue occurred only on the second monitor. I found that it also occurred if the library floated on the first monitor. I sent various screen captures. Support’s Q to McG about whether the issue occurs with docked libraries strikes me as a reasonable attempt to narrow the problem. In short, I agree with Chromestar—the folks behind Poser are taking reported issues seriously and working on resolutions. – Just my contribution to the marketplace of ideas.