Go a little lower in that same web page
http://www.dynonavionics.com/docs/support_software.html
with heading Dynon Product Support Program,.. you will see:
5.3 (D6/D60 1.1) PC Software
Actually, by the description, it is the D10/100/180 etc software. Version 5.3 is what is required for the whole Dxx/Dxxx family. Don't know why they labelled it D6/D60.