You can email Lee@thegamecreators.com to see if he can make this work for you. You may not get a response till Monday.
Try rolling back to the public release v 1.13 frozen. This is an old version that was frozen to keep working with XP machines with lower specs.
This is not going to give you a very good performance, but at least you could see if the program loads and runs on your rig.
As all have pointed out. Game Guru is graphic intensive and it appears that your setup does not meet the minimal requirements for running.
Also before you rack up a bunch of hours on Game Guru, you may consider the refund option.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit, Screen resolution 1680 x 1050.