Image Hopper can be used with the Gravity Forms Save and Continue feature. This means that images are automatically restored in the form when accessing the save and continue recovery link.
This is an important feature to have because it saves your users the hassle of having to re-upload images when they resume with filling out their forms.
To enable this feature, go to the Form Settings, scroll down and enable the Save and Continue feature and save the settings.
To test it out, Preview the form, upload multiple images to the Image Hopper field and select the Save and Continue Later button. When you use the recovery link provided, all uploaded images will be automatically re-hydrated. Easy peasy!