Héctor, I love the plugin. I'm having an issue right now where I am trying to change the option "Resize image from Custom field?:" to "Yes."
When I select Yes from the dropdown, and then hit apply, it doesn't seem to save the changed setting and just reverts it back to "No, I will upload..."
Here's a screencapture of what is happening:
Any help here would be great - I'd love to enable this feature so that WPP isn't loading in tons of huge thumbnails :)