You can determine the currently installed EJS OnSite applications Version through a couple of different ways:

1. Open any EJS OnSite program and look at the very top of the Main Dialog's Title Bar. It should read (for example):
   

   "EJS OnSite Police Records Program -- Version 4.2a Windows"
   as shown in the picture below:
   
   

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2. From the menu bar of any dialog of any EJS OnSite program, select: "Help" → "Product Information". This dialog contains extended product information, including the program version, which is outlined in red in the picture below: