Tell us about yourself!
Sorry for the late reply, but I ran into the same issue and I figured out the solution. So for the benefit of anyone who happens to see this...Find the *actual* boards.txt that the IDE is using. For me it was in:C:\Program Files (x86)\Arduino\hardware\arduino\avrEdit the file (you may need to launch Notepad with admin privs), and copy-paste the contents of the boards.txt file attached to this instructable to the bottom of the boards.txt on your computer. Done!