Overall this is a good plugin but i have a few things i think need fixing
When creating a model it looks super stretched in the editor the only way to see it no stretched is if you boot the game and once the object loads set the z scale to the 3d cams and then run the rotation command, it would be nice to see a zscale option the the object so you can set it there, another thing that needs adding is a re render button because if you change the model it stays with the old one and you have to reopen the project. last the texture on this model is off, i've tryed reimporting and reexsporting but nothing seems to work any ideas? 
Ok, I think I got this fixed, thanks for the sample models, they render correctly for me now. It looks like the UVs for these models expect the texture mode to be repeated (which is the gltf/glb default.) So, I have updated the addon to have default teture wrap, please try out the latest version.
Also - can you point me at what tool created these models? I am interested in why the uvs are set this way.
Works perfectly! i got the models from here and ran then through a converter, and in the players case it also went through mixamo
For the stretch of the model, set the project z-xis setting to 'regular'. I've updated the notes to include this comment.
In terms of the texture, if you are not using the texture embedded directly into the gltf/glb file (which is now the recommended way after I added this support) and you are using the texture in the image editor, the texture size must be larger than the Project settings sprite sheet size. If you need to continue to use the texture in the image editor, I recommend setting the Project sprite sheet setting to 512 and then resizing any image textures to be larger than 512x512.
In terms of updating the model on the file name change, I have added that to my list of possible future enhancements.
I am using the embedded texture, also you cant change the z-axis its read only
Models I'm using:
https://drive.google.com/drive/folders/17UAx6R6pWFqraifpFawOt92q0ow5B4wI?usp=sha...
Thanks for the model reference, there does seem to be some different formatting for these models compared to the ones I use, I'm taking a look.
For the Project Display -> Z axis scale, you should be able to change to regular (I can), if you still can't can you send me your project, so I can take a look?