@GeraintJo in AEM 6.5, it is Dynamic Media : Reprocess Assets. Can you please try using DAM Update Asset once? 

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@David_Fischer92  if you don't have the option to create a custom utility, it would be best to remove the root folder from crxde.  You can navigate to /content/dam/<yourfolder> in this path https://<yourdomainIP>/crx/de and right click> delete the root node.    Hope this helps.

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