I've been quite busy lately.  Did a totally clean uninstall and checked everywhere for traces that Poser was once here.  All clean.  Then ran my cleaners, CC Cleaner, Wise Registry cleaner,  Windows own clear-up-the-junk App and followed that lot up with a defrag.

This morning re-installed Poser 7 and saw a lot of Screens I hadn't been seeing, like the Poser opening Screen when you can select what you want to do.

Poser started, much to my surprise and opened a miniature Document Window with Simon in it.  It also reported that this file is a later Version but we'll try to load it anyway etc. etc. and finally I got as far as changing the Document window figure (one of my V4 Girls)  and opening my library which was my external Content library and it never did that before.  Then I saved my preferences so that my Startup would always be my startup.  Except that ten seconds later I was bombed out to the Desktop. !  ?  !  So it's back to square one, guys.  Oh yes, in the middle of all this, the bit where I changed start-up figure, this was done by opening a file from my external Content.  So even that seemed at the time to be promising.