@LeoLee Crashes on exit are typical of extensions side-effects. For example, the Reality plugin was causing my Poser 11 to degrade performance down to a crawl when it was not even used. Anything I did would cause intensive disk access for a few minutes, which freezes Windows itself. I took a look on the log, and it was the Reality plugin. Uninstalling it got Poser back to normal performance, thanks goodness! I have reported this to SMS and also to Paolo, but I think they just acknowledged it.
Right now Poser is refusing to close on exit, and the logs are showing the culprit is the "Figure Manager" plugin. I think it wasn't updated between Poser 10 and 11, and now it's causing trouble. I bought it from RDNA, so I am not sure what can be done about it.
But the bottom line is that plugins and extensions can definitely cause issues, especially in DS, because DAZ tend to change things without notice, which can affect the plugins in unexpected ways.