I use WP 4.6.1, Woocommerce 2.6.4., WP Retina 2x
Yesterday I launched an Optimize All on 1000 images and went to bed. Back this morning, it was still "running", So I've stopped it. 50 images had been compressed!

So I have 3 questions :
- Am I supposed to leave WP open for it to run? / How is "Optimize all" supposed to be used?
- Where does compressing occur (my site, cloud?)
- Does Image recycle recompresse already compressed images (on desktop or by other plugins)?
PS : is this plugin maintained for WP? because it hasn't been updated for more than half a year.
Cheers,
J.