and all I see are blue image thumbnails.
Aaah, the old blue thumbnail disease!
Seriously, this is caused by a bad or imcorrect monitor profile being set in Qimage as a Monitor profile.
First move, it to Click View and Rebuild thumbs. Still Blue? Change the monitor profile to one that belongs to the monitor. If you never created one, use the sRGB monitor profile that comes with Qimage and which is usually also found in your stash of profiles.
C:\Windows\system32\spool\drivers
You can get to this easily by clicking the blue ball next to Monitor Profile in Qimage.
Then do another View, Rebuild thumbs.
Fred