I found my textures folder had too much in it, this caused an annoying effect of auto scrolling to the end by itself while searching. I have created a desktop folder outside of Poser containing misc texture folders that I have downloaded and another for morphs. Works great, I check out the folders and memorise what's needed, then load from the desktop folder when setting up for rendering. The other advantage is avoiding the 300 folders capacity within the program.
Tommy