Can't get drush to work after moving to Acquia Dev Desktop
Use the console coming with ADD - launch the console from the ADD client. Using that console everything is correct setup. You might of course get everything to work inside your "Bash" (which it think you are using since you talk about the "which" command), but it kind of removes the whole point of using ADD - that everything is working out the box. 

PS! I use Git Bash for my Git work and the ADD (cmd) console for Drush work. Then I don't have to think ;-)