TRIAL EDITION:  The trial edition of FRED is a fully functional working version of FRED that you can use for a limited time to explore FRED's great power, versatility, and ease of use.  It is also convenient to begin developing your own FRED models to use for your current projects.  These models are 100% compatible with the release version of FRED. H96BqNoO  
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DEMO EDITION:  The demo edition of FRED is a working version of FRED that boasts all the powerful features of the release version except 1) FRED models can not be saved, 2) the scripting language is disabled, and 3) only a limited number of rays can be traced.  There are no time limits or authorization codes needed to run the DEMO edition. {