Premiere Pro is not backwards compatible.
I'm pretty sure that psd files can open in earlier Photoshop versions, but I'm not 100% sure.
Open your project file (make a copy for safe) in text editor.
Then change Version="25" to Version="24" in <Project ObjectID="1" ... row.
After that you can open or import this project in SC5.5.
Projects saved in CS6 can be opened in CS5 (not sure about 5.5 but i think they'll open). Premiere just asks for a new filename (as it does when you try to open a CS5 project in CS6).
I have tried and I can confirm
thank you, kindly Jon
Thank you, kindly, Kostas—so far the only thing I found that will not be
in CS5.5 from CS6 in Photoshop is the new Clone Move/Content Aware tool.
Premiere crashes when I do this and try to open the new edited file. I don't know why...
I am in a situation where I am taking over for someone who used Premiere CS 6 and I now have to edit their project but I am using 5.5. I am still in contact with my predecessor but he has never saved a 6 proj as 5.5. Does anyone know where I can find a step by step example I can send him to save the 6 project in 5.5? Thank you
You can't officially save PrPro CS6 project as PrPro CS5.5.
As said in the comment #2, you can open up PrPro CS6 .prproj file in a script editor (e.g. Adobe ExtendScript Toolkit) or even a text editor (preferably, which respects formatting, but doesn't add its own formatting) and then in the fourth line replace Version="25" with Version="24":
<?xml version="1.0" encoding="UTF-8"?>
<Project ObjectID="1" ClassID="62ad66dd-0dcd-42da-a660-6d8fbde94876" Version="24">
Keep in mind that everything is at your own peril, and new PrPro CS6 features can't be converted (properly interpreted) to PrPro CS5.5. Some changes in GUI can even cause a crash, as described in the comment #6. To overcome crash issues you can rely on a good old trick of importing a project into a project (i.e. create a brand new PrPro CS5.5 project and import into it the one, within which you replaced Version="25" with Version="24").
Thank you, I appreciate the help.