Give a screenshot of your plugin folder.Sorry if this sounds noobish but here is my situatuon
I downloaded the game through freeShop.
It asks me to update to 1.5, and then once I do that Welcome Amiibo appears on the main menu.
I dropped the plugin file into my plugins folder but yet the menu doesn't appear when I press select.
I am using 11.3 and the NTR 3.4 preview build