How do I download my assets

I downloaded unity onto my PC & need my assets from my college account, but I downloaded them all already onto a college computer I no longer have access to because they were replaced.

How do I redownload my assets?

Because all it says is that I’ve already purchased them, but doesn’t have a download button anymore.

If you have uploaded your projects to GitHub then download them and export the packages.
If your packages were purchased from the AssetStore, then download them through the PackageManager.
If you do not have access to projects with packages, they are not in your AssetStore, then you cannot get them from another computer like any other file.