Projects saved in SoapUI 5.2.1 are not actually getting saved. Any advice on how to fix?

Although I have had SoapUI I just recently became more active in using the software and upgraded to 5.2.1 on 2/3/16.

Since that time, no updates to my projects are saving. I have tried all of the different ways of saving...click SaveAll button; File/SaveAll Projects; Right-click project and select "Save Project" or Save Project As".....none of these are saving my updates to existing projects or even newly created projects.

Is my software in some sort of "read-only" mode now?