Lightroom CC, Moving an image to a directory that has a file of the same name generates an error that the file already exists. The error offers a "save as box" like most well behaved file managers except it does not allow the user to change the file type from .TXT to any other file type. I am willing and understand changing file names. Lightroom developers missed this boat badly. I suspect the Windows and Apple API's both have standards that Adobe has violated.