Printful Incompatability and button issue

Hi, I downloaded your plugin and really like the features, but I had to delete it from my site because it was making all of my Printful products not available. If I clicked on a color, all sizes would be marked as out of stock and vise versa. It did work on my only variable non-Printful listing, but it only has one attribute. Will this plugin be compatible with Printful?
Screenshots of out of stock issue: https://snipboard.io/isuNPe.jpg
https://snipboard.io/b7QoKh.jpg

Another issue I have even after deleting the plugin from my site is that the button for all of my variable listings now say “Add to Cart” when they did say “Select Options” on the shop page. Did this plugin override the text of the button in my store that stay even after deleting the plugin? How can the button go back to what it said before downloading your plugin?

The page I need help with: [log in to see the link]