Rather sad, but the dev is entitled to a life. Read his post here.
https://8pecxstudios.com/Forums/viewtopic.php?f=6&t=1756&sid=5db66f6159b80f6c9336c3b31396fc63
Never heard of this program before. Read a little about it on their website and it seems pretty cool. What exactly are they doing to optimize this browser for AMD vs Intel. It doesn't really explain the difference and every program I've ever seen listed as x64 just says AMD 64 bit because of the architecture. Seems a little late to try it now though.