Help with Excalibur on Windows

I just purchased Excalibur and after installing and opening Premiere for the first time, I can't open the extension, the default shortcut alt + space, just overrides to the windows menu drop down short cut, and the settings editors doesn't seem to allow me to change the Excalibur shortcut. Once I click on the short cut it turns blue but no amount of input will result in a new shortcut. Am I doing something wrong or have missed something? I can't seem to find anything about this in the documentation.