I've clicked the awesim:// link and nothing happened.
Be sure to launch AweSimConnect.exe at least once. The initial launch will add a key to your user registry that initializes the URI scheme.
If you move or rename the AweSimConnect.exe file, you will need to open the application again manually to update the path in the handler.
I've received the error "Unable to open helper application. The protocol specified in this address is not valid."
This issue appears in some earlier versions of Internet Explorer when attempting to launch the application from a Temporary location. Download and run the AweSimConnect.exe application, being sure to click "Save As" or "Save" in your browser to save the file to a non-temporary location.