BOOSTER SEO & IMAGE OPTIMIZER

We have been using this app now for one month on the pro plan. At first the app optimized 545 article Pictures with alt text- for free. Then we paid, added about 150 additional items in the shop- nothing happens... it still syncs only the 545 articles- and all the rest that the app brags about (repairing links, SEO etc.) we cannot verify cause we get no result whatsoever. No additional orders, no more pictures in Google ... Definetly we will deinstall this app- its costly and of no use.