i just downloaded version 2.9 from "my account" - the filename ist "WebGMapsSetupReg.zip" when i run the setup it detects the old version and uninstalls it. but in the next step i am unable to select the version for which it should be installed:
so i have to select "manual" and the setup finishes.
but there are bo 2007-2010 *.dproj files in the installation-folder.