Appath can always print directly to any thermal or regular desktop printer via Google Cloud Print. Even better, you can print from Appath to any connected printer in the world, using Google Cloud Print. You can even do this when you’are away from the office.
For more info on how to set up Google Cloud Print, please check this forum post.
You can always change the default printers for any of your labels, by going to the Print Settings section inside Settings.