From the FFDS forum:
Posted by Arnie Lee on Friday, 4 July 2003, at 8:27 p.m.
While Louis is off on a short July 4th Holiday Vacation, we're going to sneak in FSDS V2.20.
This is a significant update to the widely used V2.11 and takes into consideration many of the suggestions that have been made by the members of this Forum.
Thanks to those of you who have worked with Louis and Abacus to improve this design tool. Special thanks to Tom Gibson and Graham Oxtoby.
And for those of you who are planning to move to FS2004, this version of FSDS will support "Century of Flight".
Registered users of FSDS V2.xx can download the FREE update from here:
Thanks again for your support.
Pegasus Aviation Design