I think I've done with this plugin for now. It adequately addresses the problem I was having with bulk changing textures as well as helping me track down duplicates, disused textures, and disused furniture.

This really is a very nice little tool. Like the way I can find out and tidy up textures used on various objects. The way it identifies the object on which the texture is used is a valuable feature. I would love for this to work on walls/floors too, but still. This is one I will keep. Thanks. ok