Problem picking up changes in nfo files

[ZmgwsYzhM2nV]

Just to elaborate a little more, sometimes I add video files for which there's no metadata at sites like the themoviedb.org etc. at all. And sometimes I add segments or chapters to these video files at a later date, and then I want to update the nfo file with a description of that particular chapter. The only workaround I found is removing the directory of, let's say, a show, do a scan, add the directory again and then do a scan again. But that's hardly a nice way of doing things...