Everything greyed out (except design)

Despite my best efforts I had to abandon my project, attempts to create a 64 to 6 encoder (based on some 8to3 Encode code found in various forums) would have required a CPLD with 129 GPIO 'pins' (despite there being only 70 physical pins used) so any off-the-shelf dev board would not have been suitable and certainly not affordable. In this case (and I suspect for many other projects) it is far easier, faster and cheaper to use discreet logic. That'll teach me not to try something 'new'.