Ok, I will add that licence, but this is just a test. Attention, you say that sizes works for you, but in this case for the small I modified the size with Batch editor after I uploaded the photo. That's why I want to check, because I read somwhere in hel that if the size is modified after the upload the image cannot be resized.
For a test, when I refund the money, I don't think is necessary to have a Standard Licence, is just a test.