Is there any way to edit or change the resource icon once the mod has been saved to the repository? Or do I have to re-upload it? Also, what is the deal with 96x96 pixels for resource icons? I shrank mine down to the suggested size but they look very low quality compared to everyone elses icons, so I'm guessing we're allowed to go bigger than 96x96?
You should be seeing an 'Edit Resource' button (which is where you can change the description of a mod, without posting an update) Below that, there should be an 'Edit Resource Icon' button. If you don't see it, please share a screenshot of the buttons you see.