I think medzin may have hit on it.

What I'd do

1st, I'd turn off the 'hide extensions for known file types' in Tools->Folder Options... or wherever it is in your OS - more trouble than it's worth IMO.

Then try renaming the "Laura 3" file that's 9,318 KB. I'm assuming that with extensions on it will show up as Laura 3.cr2. Rename it to "Laura 3.cr2.xxx" or something similar.

Remove the leading "_" from the 14,776KB file so it becomes "Laura 3.cr2"  You already have the thumbnails, so everything should hopefully show up correctly in the Poser library.

This is all assuming that you've been trying to use the 9,318 KB file, whose origin is mysterious. Did you ever make a modified L3 and save her to your library? If you can remember what it's for, give it a descriptive name and remove the ".xxx" so it'll show up - and make a thumbnail for it.

 

Apologies if any of this is too obvious :-) 

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken