I ended up discovering a different way of uploading files (butler) which is much nicer and doesn't have the 1GB restriction. So, as promised, I just updated the app to include five different model sizes, which are now available in v1.5.2.
I didn't want to include all the 3 versions of the large model as the download is already at about 5GB so I only added large-v1 which seems to be the one with least amount of issues in general, but if you want to use any of the other 2 large models (v2 or v3), you can simply copy the model you want to use to the models folder and change its name to large-v1 and it will use that model instead when you select the most accurate setting.