Sometimes you might want to test the app on an unpublished theme while having it disabled on your current theme, or the other way around. To do so, please insert the following script:
var DISABLE_GIFT_BOX = "true";
To the index.liquid, collection.liquid, product.liquid, and cart.liquid files on your theme code.
After doing that, the app shouldn't be visible on the theme where you inserted the script, but it should work on the other themes you have in your store.