Welcome back!
We’ve rebuilt the majority of the documentation in an attempt to make it much simpler and more streamlined. You can find the docs here: http://monome.org/docs/, which is accessible directly from the monome.org homepage.
Once there click on on ‘Setup and Introduction’ which has a link to the installer that will get Serialosc setup and make sure the FTDI driver is installed if you’re running an older operating system. From there, Max 7 is the best bet as it already has the required monome abstractions included.