I have been using Astro Synthesis for some time and recently upgraded to version 3.0. It is a great tool. My group is playing an interstellar 4X game that used to be PBM. We get the stellar coordinates from the game database file and paste them into a spreadsheet saved as CSV. Run the import in Astor Synthesis and viola! There are several useful plugins as well.
The only improvement I would like to see is a way to dynamically access the underlying AstroDB file system from an external MS Access or VB application using a robust ODBC driver. Alas, we have yet to find a reliable way to do that to date and the author does not seem willing to facilitate our needs in that regard. This has us continuing to look deeper at developing our own tools and eventually leaving Astro Synthesis behind. But for now it is great once you get the data imported.
[4 of 5 Stars!]