Edit User\PluginEnablerordisablerPlugin.cs and insert the line:
Hud.GetPlugin<InventoryAndStashPlugin>().NotGoodDisplayEnabled = false;
Look at the file that comes from the example (User\PluginEnablerOrDisablerPlugin.txt)
If you do not have the file PluginEnablerOrDisablerPlugin.cs in the User folder, rename PluginEnablerOrDisablerPlugin.txt from that folder to PluginEnablerOrDisablerPlugin.cs