We can use Microsoft's Enhanced Mitigation Experience Toolkit to easily toggle ASLR on and off with a reboot. This way you don't have to make any manual registry settings and you can also control DEP, SEHOP and Certificate Trust if you need to.
You can download EMET 4.1 here: http://www.microsoft.com/en-us/download/details.aspx?id=41138
To disable ASLR:
Simply select the drop down next so ASLR and choose disable. You will need to reboot after that.