pluging

Hi. I installed “Enable Media Replace” plugin, i’m trying to replace images in sliding bacground but for some reason it does not work.if i tick “Just replace the file” ,in the library the big image is replaced but thumnils are still old picture’s thumbnails and slider still displys original old picture. If i tick “Replace the file, use new file name and update all links” old images and thumbnails are replaced but slider shows still old pictures, despite it does not exist in the library. Could you help me pls.
Thx.
David.
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