How can I find the serial number on an AnywhereUSB product

The serial number can be found on a white sticker typically located on the bottom of the AnywhereUSB device.  
The serial number will start with an  S in parentheses and letters\numbers after the S.
 
Another method is to use the AnywhereUSB config utility to locate the serial number.  
The AnywhereUSB config utility is installed with the AnywhereUSB drivers.    
The serial number is located in the Remote Hub Information section in the AnywhereUSB config utility.
 
AnywhereUSB config utility: