Premiere Pro users sometimes want to open their project in an earlier version.
Here’s the quickest way to open your projects in an earlier version.
(Note: I don't own this website, just been using it for a few years for downgrading)
This is the easiest method I have found for downgrading PP project versions
The manual way can be a little complicated and intimidating for some users, so just use this website instead!
A Premiere project (.prproj) file is basically an xml file wrapped up in gzip compression. One of the nodes contains a version number corresponding to the version of Premiere which created it.
Premiere checks this when opening a file and refuses to open anything with a lower version number, even when the project is basically compatible: "This project was saved in a newer version of Adobe Premiere Pro and cannot be opened in this version."
This tool simply changes that version number to '1' and creates a gzip compressed file which Premiere can read.
You can perform the same process yourself manually, as described here, however this tool makes it simple. Because this is a cheat, some filters and effects may be lost when converting