That includes a royalty-free license to use it in your programs. It includes libraries for all supported platforms and compilers, but it does not include the source code. Specially-priced DOS and Windows bundles are available. Please see the price list page for additional information. We update Fastgraph frequently and make the improved code available for free in the form of downloadable patch files.
Upgrades happen about once per year.
Please see the price list for upgrade pricing information. Special discounts are available on Fastgraph for Windows for Fastgraph for DOS customers. Fastgraph source code is nice. Fastgraph is written in highly optimized, perfectly formatted assembly language. You are not going to see prettier assembly code than this very often.