1) Download the Pro version of the plugin (for free; $39 value):
https://www.dropbox.com/s/kysmffa9rl71gxt/1755-auto-image-attributes-pro.zi...2) When installing plugin, use license key:
60D2-4C07-D93C-E531-69BF
registered email:
rajshahseo@gmail.com3) Go to pro plugin page for installation instructions:
https://imageattributespro.com/Use sparingly, the plugin is extremely flexible: you can optimize your entire media library or only a handful of existing images, or only new images.