Can't change the number of channels displayed in WaveformView

[afmcelroy]

I am recording tetrode data, so my channels are arranged in groups of four. Currently, I can only see four channels at a time in WaveformView, like this:

I'd like to be able to see 12 channels at a time, so I followed the instructions here. However, this fix didn't work and I can still only see four channels at a time, even after using phy template-gui params.py --clear-state.

In ~/.phy I have created the plugins directory and made a file named channel_view.py which is copied wholesale from the tutorial above. My phy_config.py looks like this:

c = get_config()
c.Plugins.dirs = [r'/home/mouse/.phy/plugins']
c.TemplateGUI.plugins = ['ExampleNspikesViewsPlugin']

Did I make a mistake arranging the plugin or is there some reason this doesn't work?