Files not readable

After a reinstallation of my operating system (but with all preferences moved over), I am now get messages as follows when I click on files in a library

“The file…could not be opened because it is not in the right format.”

This applies to Word 2008 files. If I double-click on the file in the library, the file opens as usual in Word. It’s just the EagleFiler browsing that isn’t working.

If I edit one of these files and insert the result into EF, everything is normal.

???

Which version of the OS are you using? Are you able to open the files in TextEdit?