Media replace does n't work anymore the way it was meant.
I am able to replace by a workaround:
I have another plug in: Media Category Library. Here I can search for the media and then click the Edit function. This gives the original replace functionality and makes it possible to make the change.
I am not a WP coder, but it seems to me some kind of hook used is n't there anymore, whilst the Media Category Library uses this hook afterall.
It look like you have to update the code to make it function again.
Will you please do?