JebsSecretary

Does anyone else have problems with the close cycle gas core engine? Since I updated KSPIE to the latest version, it needs a reactor to run... I thought the whole point of the engine was that it is a crazy type of reactor? Unless I have a reactor present, I can´t select a propellant in the VAB. If I then add the reactor, it works just fine... Does this make sense? Am I doing something wrong?