Hi Jess,
Ui, you really have a serious problem, your background is nearly 40 MB large ??
Generally, compressing/optimizing images is out of the plugins scope, as this is a general problem.
Things should do:
- Use JPG instead of PNG for photos, which really reduces the size.
- Use small images, see if it is still okay to half the images size.
- From within the plugin, when you select the image you can choose one of the sizes, try to avoid “Full Size”.
- Lower the quality. Background images typically don’t need to be very detailed. Use JPG and try to use a low quality like 50%.
- Use images as pattern, means use a small image which can be layed out like a better to build a large background.
- Use some WordPress plugins to optimize images “on-the-fly”, like EWWW and Resize Image After Upload
For simple tasks you could use the free Paint.net
I hope this helps.
Adrian