Windows 10: Windows 10 explorer preview prevents PDF delete. Is this being fixed?

Thanks for testing - I don't have Acrobat Pro so I couldn't do that part. Good to know it's a possible workaround and they can coexist.

I wonder if un-installing Reader DC then un-registered the Registry keys which go with the DLL? (Perhaps - I'm just guessing.) There's some info here if you're interested in how Preview Handlers are held in the registry - not that I know any more than I read here.
https://msdn.microsoft.com/en-us/lib...=vs.85%29.aspx

However I'm always a bit cautious of copying random DLLs around without fully knowing how they work or what dependencies are with other DLLs. Installing both Acrobat and Reader DC (presumably Acrobat needs to be first and Reader DC second) seems to be the safest way.