Guido,
a) You seem to have accidentally posted in the wrong section of the forum.
b) You already own the 64-bit version.
I am right about that, aren't I? Someone be sure to correct me if I'm wrong. You might only have one icon on your desktop by default (maybe), but if you navigate through the Start menu, you should see both regular and 64-bit iClone.
iClone 7... Character Creator... Substance Designer/Painter... Blender... Audacity...
Desktop (homebuilt) - Windows 10, Ryzen 9 3900x CPU, GTX 1080 GPU (8GB), 32GB RAM, Asus X570 Pro motherboard, 2TB SSD, terabytes of disk space, dual monitors.
Laptop - Windows 10, MSI GS63VR STEALTH-252, 16GB RAM, GTX 1060 (6GB), 256GB SSD and 1TB HDD