Can not restore a *.prj file from the zenOn Explorer with the zenOn Editor

Can not restore a *.prj file from the zenOn Explorer with the zenOn Editor

Somebody help me !
How to open *.prj file? why I can't insert prj files? If use the zenon-explorer open the project files? thank you very much!

This is a migrated post! Originally posted on 02.03.2008 by user kyle_lee. Please be aware that information can be outdated.