Exporting from P3e to Suretrak 3b

We have someone who is sending us a program from P3e. Our understanding is that it must be exported to .prx (P3 3.1 format).

I don’t have any idea what the person needs to do to get it to .prx format. Is this SAVE AS or EXPORT?

Also... does this create just one .prx file? Or is it a series of files which he must send me.

I received a .prx file from him today but Suretrak didn’t recognize it. I selected both P3 and Group Projects.

Do I need to IMPORT or just open the project?

thanks for any help

Diane