The PiFile application is nowhere to be found on the developer's website. This means it's impossible to provide solutions if there are no documents, FAQ page, troubleshooting files, etc. I recommend that you leave the file as it is and then use the contact options on the developer's website to get in touch with them.
Contact page: http://www.fannsoftware.com/Contacts.html
Note: Explain the situation and they should give you a fix for the issue, in case they still offer support for application.