Cannot see any model in ChiTuBox

[chadcham]

The slicer worked great for me until I had to zoom out and my mouse went kind of crazy to the point I could not see my model.  Since that time, no matter what I do I cannot view any model than I load.  There is no option to 'recenter' on to the loaded model or to 'reset to default' for the view.  I have uninstalled and reinstalled the slicer and that did not help at all.  

Any pointers would be greatly appreciated!

Chad