i currently own a license for 3.6 professional edition. I was to upgrade to 3.7. but I don't really understand the workstation run time royalty versus classic 1-what are the advantages/differences of workstation versus classic 2-what distinguishes a rich client from a Visualization,software development etc It seems that you will not be updating or improving the "classic" version anyway. So the choice is stay with something that is no longer getting updated or possibly involuntarily violate the license agreement. or pay the 5000 per application (or 100 per copy). let's say you want to develop a shareware product competing with something like MilkShape for games. that is "Visualization" technically. now you have to charge at least 100 dollars just to cover run time fee. most sharewares are priced between 20 to 40 dollars. that rules out Jet for 95% of shareware products as long as there is any Visualization, software development or engineering aspect to it . How about an add-on to CAD? an add on to an IDE that costs let's say $120 and i was to develop an add-on using JET then I would have to charge more than the IDE for an Add-on? how about an add-on to open source PDF library to render engineering diagram in a PDF or as a library and an application uses that library is built. how do i know what workstation the final application is going to run on? There are a lot of ways to either end up violating the agreement (involuntarily) or economically get cut out of whole range of software categories. Most small independant developers develop products around an already popular product , and they can't compete if their prices are too high or cost as much as core product feed back would be greatly appreciated . I am trying to evaluate if should upgrade or as a small independant developer I have been cut of the loop or I just don't understand the run time licensing scheme.