The instructions work fine... no idea what your doing..
I downloaded latest Arduino 1.6.9 windows.zip onto my old Windows Xp machine
Extracted the zip to the desktop
Ran the IDE, as expected no Sanguino files
Open up the menu File|Preferences
At the bottom is a field Additional Boards manager URLs:
Enter "https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json"
Click OK
Open up the menu Tools|Board:|Boards manager...
This will open the manager. Scroll down till you see Sanguino
Click more info, this will reveal an install button.
Hit install.
Close the Board manager.
Sanguino is now in the list of boards at the bottom.
Select it and new menu item is now visable in the Tools menu. Processor
Now select the type of Processor 644p at 16mhz or 1284p at 16mhz are normal for Sanguino boards, though you can get 20mhz versions, for that you will need to edit the boards.txt file
I downloaded latest Arduino 1.6.9 windows.zip onto my old Windows Xp machine
Extracted the zip to the desktop
Ran the IDE, as expected no Sanguino files
Open up the menu File|Preferences
At the bottom is a field Additional Boards manager URLs:
Enter "https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json"
Click OK
Open up the menu Tools|Board:|Boards manager...
This will open the manager. Scroll down till you see Sanguino
Click more info, this will reveal an install button.
Hit install.
Close the Board manager.
Sanguino is now in the list of boards at the bottom.
Select it and new menu item is now visable in the Tools menu. Processor
Now select the type of Processor 644p at 16mhz or 1284p at 16mhz are normal for Sanguino boards, though you can get 20mhz versions, for that you will need to edit the boards.txt file