Check If you have DEP (Data Execution Prevention) turned on for Kingdom Elemental:
Go to the Control panel->System->Advanced tab and click on the 'Settings' button in the Performance box. Then you click on the 'Data Execution Prevention' tab.
Make sure the first option:
"Turn on DEP for essential Windows programs and services only"
is checked or if you have the 2nd option:
"Turn on DEP for all programs and services except those I select"
checked add Kingdom Elemental as an exception by clicking:
"add"
and selecting the Kingdom Elemental Demo.
I think this problem will be eliminated with the next update.