Glad to hear you've figured it out!
Is there anyway to affect scaling so it will clamp to a 10x10 pixel base rather than a 1 pixel base? (I'm not even sure if I'm using the right terminology here, I hope I'm making sense!)
I'm afraid there is no such filter option available in the Spine Editor, sorry. In general it is not recommended to use 10x the resolution that is actually needed. If you want to avoid your pixel art from being blurry, please change the filtering (also on the runtime side) of your textures to nearest-neighbour filtering. Using default linear filtering will blur your image.
A side note for later:
Please note that on the runtime side of things, you will also need to setup things accordingly so that your skeleton is rendered in a "low-resolution" style. The Spine Editor just provides features to display (or preview) your art in multiple ways. When exporting your project as a skeleton with bones and atlas textures, these preview and filter settings will unfortunately not find its way to e.g. the spine-unity runtime upon import in your game.