I was using the plugin for the website I am working on (en.younesrahmoun.com), it looked working fine. but lately I noticed that the home page scrolling slow, the I found that the thumbnails was loading the original images (bigger files). The other archive pages was fine, shows great on retina and normal on pc.
I was trying to fix the home page bug by selecting different methods on the plugin, the I tried to remove all 2x files and regenerate them. then I appeared that the thumbnails on the whole website referring to original image files (without any added number of resolution in file name). I deactivated the plugin with no results and uninstalled it.
I also tried to restore the theme original files with no success.
When looking at my uploads folders I found all the image sizes generated by WordPress there.
I tried also to delete an image from a post and uploaded a new one, but also the original image is used for the thumbnail of the post.
Please check the website especially the Installations archive page, and you should find the page is freezing now when loading the image files.
I need help solving this since I don't have a good knowledge on PHP and WP code structure. I am worry that I have to repeat all the work from the beginning.