Drive Calculator version 3.3 is available, for Windows, Mac and Linux. Christian Persson lists the new features here:
http://groups.yahoo.com/group/D-calc/message/176
And here:
http://www.rcgroups.com/forums/showthread.php?t=771184
Download, help, announcements, discussion:
http://www.yahoogroups.com/group/D-calc Vriendelijke groeten 
Ron van Sommeren
motor building tips & tricks
diy brushless motor discussion group
int. electric fly-in, Nijmegen, the Netherlands