Personal is for individual use, Indie covers small teams or indie devs, and Professional is for studios or commercial distribution. Full details are on each product page.
Yes, as long as you have an account, your purchases are stored under your profile for future access.
After checkout, you will see the “Download Avatar” button on the product page next to “Leave a Review.” Click on this button and the download will activate.
Just choose a license tier (Personal, Indie, or Professional), add the item to your cart, and proceed to checkout.