Updated: We have fixed this issue, you can now downloading Desktop 64 bit here.
So, we screwed up and missed menu files from Desktop 64 bit. We’re really sorry about this! We’ve fixed the issue now and are uploading a new ISO as I type this. However, for those who have downloaded the broken image and don’t want to download a whole new ISO, there is a fix; courtesy of our amazing user James Johnson.
If you type lxpup into the prompt which comes up, Simplicity Desktop 64 Bit Edition will boot just fine.
Again, sorry to the people who downloaded 64 Bit Desktop and found nothing but a blinking terminal prompt!