The 3 downloads are, the "main" iClone program installer, the "Bonus" content and the third is a collection of the G6 avatars with different clothes.
If you have already downloaded the items on one computer then you could copy them to your new PC using a USB stick - this would save a lot on download time.
Gerry
System: Win 10 Pro (21H2), Asus X99-E WS, CPU i7-5930K -3,5 GHz, 32 GB DDR4 2666-16 RAM, NVidia GTX 1080 Ti GPU - 11 GB VRAM(Driver Studio-536.99), Samsung 850 Pro 512 GB SSD, 6 TB HD storage.