There are some HWD for the DM1000 and DM1200, but they are currently not available on the Update Center. Seems like there is still a lot of development being done to them, and so they are selectively giving them out upon request. At this time, the best way to get them is to contact the Plus+1 HelpDesk, and they should be able to share a download link to the files. Then you can install them manually, and start your development work. Hopefully that helps get you going.