Flow simulation crashes

Hi:

I was conducting a CFD simulation case using solidworks flow simulation.In order to check some geometry variation check, i disable the flow simulation (removing the tick from the tools> add-in) and the made my change to geometry, but afterwards when I re-load the flow simulation add-in it starts hanging and I believe I can not access to CFD case setting anymore. Does anyone have any solution or work around for this case.

Any comments is highly appreciated

best regards

SolidworksSimulation