Hi everyone
Thanks for report the bug, we just release new version 1.8.0 with that fixed and some featured for easy to customize the background color than before
When you upgrade to version 1.8.0, it will be automatic upgrade the wrong image url to correct url with http or https depend on your site is SSL or no
See the changelog
= 1.9.0 – 2016/02/02 =
* Feature – Define new ‘Background Color’ type on plugin framework with ON | OFF switch to disable background or enable it
* Feature – Define new function – hextorgb() – for convert hex color to rgb color on plugin framework
* Feature – Define new function – generate_background_color_css() – for export background style code on plugin framework that is used to make custom style
* Feature – Apply ‘Background Color’ type for background options from plugin settings
* Feature – Define new ‘strip_methods’ argument for Uploader type, allow strip http/https or no
* Tweak – Update core style and script of plugin framework for support Background Color type
* Tweak – Get new background color style for email content
* Tweak – Move all upgrade function code to /includes/updates/ path
* Tweak – Tested for full compatibility with WooCommerce version 2.5.2
* Update – Make upgrade function for convert old data to new data when upgrade to new version 1.9.0
* Fix – Update all images in email content for don’t strip http/https with set ‘false’ for ‘strip_methods’
Regards,
Nguyen