Vista - FolderShare Error Messages

I occasionally get an error message that states:

"FolderShare was unable to replace this file with a more recent version.
Please close the file if you have it open, and check that you have permission
to access it" One has two options - either "Retry" or "Exit".

If one selects "Exit", a message comes that states - "Are you sure you want
to shut down FolderShare?" If one selects yes, FS shuts down. If I close
the application who's files are synchronized by FS and then re-open it, the
files that were being synchronized have been deleted - they don't exist.

I think the whole problem is created in the first place if computer 1 has
the files open, and computer 2 has the files open at the same time, changes
them, closes them and FS sends the updated files to computer 1 which now has
an outdated version open. I don't understand why the now-outdated files are
deleted on computer 1, and there are no updated files from computer 2
available on computer 1. Any ideas?