Try renaming one of the profile folders, and see if that gets the saves to show up when you next start the game.
Try rebooting your computer, or shutting it down and restarting. A couple people have had this problem on Mac, where that has fixed it.
If that doesn't help, please email supportdos@larian.com, with your system specs and one of your profile folders zipped (containing 1 or 2 saves that don't show up in-game, to keep the file size reasonable).
To get system specs you can use the 'System Report' button from the 'About This Mac' Apple menu item or the 'System Information' app (in the utilities folder).
Folder(s) can be zipped by right clicking and selecting Compress.
