Changing Settings
    Settings can be changed by using the far right button on the toolbar or simply selecting 'settings' underneath
the Simulator menu.  Three sets of registers can be changed through this settings dialog; the general purpose
registers, single-precision floating point registers, and double-precision floating point registers.  Hexadecimal will
display register values in Hex and decimal will display them in decimal.  An option is also provided to ignore
invalid use of the $at register.