To install ImageUpWP, just go to the Chrome Webstore here:
https://chromewebstore.google.com/detail/imageupwp/flgkalegjdbepfklknjcjidfapnkpohp
Click on ADD TO CHROME
A warning will popup, click on CONTINUE TO INSTALL.
Click on ADD EXTENSION to proceed with the installation. ImageUpWP needs this permission to automatically capture your downloaded images and send them directly to your Wordpress Media.
Congratulations, ImageUpWP is now installed in your web browser and you may now start using it to automate your workflow, from Design to Publish in your Wordpress in seconds!