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Correct answer Warren Heaton

Hi, @simon0815:

Wow, project files from After Effects version 5.5 brings back some memories!

Pictured: Splash screen for Adobe After Effects 5.5

 

Those need to be opened in After Effects CS4 (version 9) and saved before they can be opened in After Effects 25.x.

Here's a download link to version 25.x versions of your AEPs:

 

It's a Zip archive on FrameIO and the presentation page can look like there's nothing to download.  Click the download button at the upper right, and you should be good.
Pictured: FrameIO download link for a Zip archive with the Download button at the upper right.

Once the Zip archive is extracted, you'll see your original 5.5 projects, the intermediate 9.0 (CS4) projects, and the current 25.x projects.  If you need to open these in a version of After Effects that is older than After Effects 25.x, the "cs4.aep" project files should open in it.
Pictured: After Effects version 25 projects highlighted in List View.

 

- Warren

2 replies

Warren Heaton
Community Expert
Warren HeatonCommunity ExpertCorrect answer
Community Expert
December 22, 2025

Hi, @simon0815:

Wow, project files from After Effects version 5.5 brings back some memories!

Pictured: Splash screen for Adobe After Effects 5.5

 

Those need to be opened in After Effects CS4 (version 9) and saved before they can be opened in After Effects 25.x.

Here's a download link to version 25.x versions of your AEPs:

 

It's a Zip archive on FrameIO and the presentation page can look like there's nothing to download.  Click the download button at the upper right, and you should be good.
Pictured: FrameIO download link for a Zip archive with the Download button at the upper right.

Once the Zip archive is extracted, you'll see your original 5.5 projects, the intermediate 9.0 (CS4) projects, and the current 25.x projects.  If you need to open these in a version of After Effects that is older than After Effects 25.x, the "cs4.aep" project files should open in it.
Pictured: After Effects version 25 projects highlighted in List View.

 

- Warren

simon0815Author
Inspiring
January 8, 2026

Hi Warren

sorry for the late response. Holydays and the flu.

Thanks a lot for your work; it works! 😄

now i need the rest of the 89 files also 😄 No, just kidding. I was looking for my raw footage, but I figured out, to blow up it to HD it's not worth 😞 I can use the full final film which I have as PAL. sadly, I don't need all the old ae files 😞

 

thanks anyway!

ToolfarmJP
Community Expert
Community Expert
December 21, 2025

Would you install AE 24.0.3 and try to open the old file?

 

simon0815Author
Inspiring
December 21, 2025

Why exactly this verison? Yes, but I installed it, but does not work.

It say the file is older than 5.5, but I have friends they tried it now with 5.5 ond does not work