As you know, Adobe installs After Effects with the year number in the folder like 2023, 2024. If you keep the specific version of After Effects, you change the folder name which does not exist before you install the new version. e.g Adobe After Effects 2030. You change it to the original folder name every time when you use the specific version.
You woud need to make a copy of the folder for backup below.
/Library/Application\ Support/Adobe/After\ Effects/24.0
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