Several websites offer old versions of Adobe After Effects for free download, including:
Finding a free, legal download for older versions of Adobe After Effects is restricted by Adobe's current licensing policies. Adobe generally only provides the current version and one major version prior through the Creative Cloud Desktop App . How to Access Older Versions (Official Methods) If you have an active subscription, you can sometimes find older versions directly in your apps list: Creative Cloud Desktop App
If you have an active subscription, you can access older versions directly: Open the Adobe Creative Cloud desktop app. Go to the tab and find After Effects in the list.