Which OS are you using? You say the library files are showing up as text files. If you mean the file type as seen in the Windows Properties box is 'Text Document' then that's wrong. The file types should be listed as "RSR File", "CR2 File", "PP2 File" etc. There may be a file association error. It sounds to me like there has been a fault in the Poser 4 instalation, I sugest that an uninstall/reinstall may be the best way to proceed.