Illustrator Updated: Won't open files made previously

[lbrigby]

I keep my illustrator on auto-update and have checked to make sure I'm up to date. Since the most recent update, files I saved before the update as an AI-editable PDF will not open as vector in Illustrator, and I get this error, suggesting the file was made in a newer version of the software (which is impossible). This is a pain because I have hundreds of files like this that I can no longer open to make edits before they go to print.

[Monika Gause]

I just tried that with a document created in Illustrator 2021 and that worked.

So for you it's happening with documents created in 2023? I don't save editable PDF, but I save AI files. Can you please upload a demo file that causes this issue for you? Dropbox or the like would be fine.

[lbrigby · Accepted solution]

Ok, weirdly have solved this--I have been selecting "open with Adobe Illustrator 2023" to open these files, but my computer was still trying to open the file with AI 2022, which was the problem.