Create text or other non-color swatches

How can you create other type of non-color swatches? I´m trying to get “sizes” to work with little luck. I´ve choosed “text” on the type selection from attribute edit page, and create several “sizes” variable, choosing “non” on the Swatch Type from each variable, but it does not show anything on the product page. Also, “Thumbnail” field appear to be not working since I activated the plugin. Any help? Thanks I have the same issue, no thumbnail field showing and it’s activated in screen settings. Same thing. Seems like free version is not working if you try to add images to the variations.