Click on your Profile Avatar icon in the top right corner and select My Downloads option.
Here you can see all the different assets types like Icons, Illustrations, 3Ds, and Lottie Animations that you have downloaded.
If you have downloaded an entire pack, you can check it in Packs. You can also search assets you have downloaded from the search bar.
If you hover your mouse on any of the downloaded assets, you will see Like and Download button. Hover the mouse on Download button and you will see all different file formats associated with the asset type. Click on any of the file type to download the asset again.