(1) the "setedit" tool from Wolfgang Litzinger, now v0.42. See http://www.setedit.de/download_e.html#AD3000Edit
(2) a freeware tool curretnly under development but already usable, created by a Dutch enthusiast. Read about that, including links to the latest version for download, at the Satnerds board. Satnerds site: http://www.satnerds.com/ Look in the ad3000 section of the board, forum "Developers: open-source editor".
The Setedit tool incorporates an up/downloader, and is quite extensive in fucntionality though you must buy a licence to use it fully (if you use cracked keys, you will also generate data corruption in the settings....) The Freeware open-source tool is still in "beta", includes no loader, but is entirely free - and the source-code is also available. The loader functionality of course is not necessary since Echostar's own loader does the job perfectly well. Download that at Echostar's site: http://www.echostar.nl
Settings databases for the ad3000 are generated by Hans Surfer and linked-to from that SatNerds board. Have a look in the forum "ad3000edit".