When I include manufacturers in the Mega Menu it doesn't change the title of this menu when I edit it in the manufacturers menu settings. It won't change it even when I try to edit the value in settings.xml directly.
a solution to this would be appreciated. Otherwise I will work around it manually.
Changing the value for the setting in the Settings.txt file will not work because of two reasons. The first is that the values in the Settings.txt file is used only during the installation of the plugin and the second is that the value of the manufacturers menu item is a resource not a setting. The setting is used only for certain default values, or when the resource is missing.
Anyways, changing the value for the manufacturers menu in the settings page of the plugins should work. Try to change it again, save the change and clear the cache of your nopCommerce store. The Clear cache link is located in the upper right corner in the administration.
If this does not work you can change the resource value manually. Go to Configuration => Languages => View string resources (for each language) => find the sevenspikes.megamenu.admin.settings.manufacturersitemnamevalue resource and change its value.
Have a nice day!