P5 to P3 then using Winzip for P3 files

I had someone e-mail a winzip file that had P5 files that were converted to P3. When I unzip the files and opened the project in P3, it corrupted my window in P3 showing the activities codes. I had to reinstall P3 to get the window to come up showing the codes however once I opened the file and closed it, the next time I opened any project, the window was corrupted again.

I may have not explained this well enouugh, however, has anyone have the same problem and have a soluton?

James Braghini
C.O.S.T., LLC