And yes, you can use Graphene Mobile or Graphene Mobile Neo with any existing website with Graphene already installed. Installation is pretty straightforward, but we also provide free installation service if you need it.
The helper zip file is a plugin, so it should be installed as a plugin. Reactivate the Graphene theme, and then activate the helper plugin and follow the instructions that will appear on screen. Let me know if you need further assistance.
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