Generally speaking, EDIUS has the capability of opening older projects (like .epj) in newer versions of the software. So it is likely that you can in fact convert old .epj projects to new .ezp format in a version of EDIUS that produces .ezp files.
Convert EDIUS Pro project to EDIUS project.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert epj to ezp on Windows
EDIUS is professional video editing software designed for any broadcast and postproduction environments, especially those with newer, tapeless forms of video recording and storage. EDIUS software offers real-time, multi-track, mixed-format editing, compositing, chroma keying, titling, and timeline output capabilities.
Convert from epj file
to ezp file
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.