I am Baas wrote:
@outskirter: Are you sure that you've got all file associations deselected?
Definitely. In fact, the keys appeared in the registry as soon as I started Bandizip for the first time, before I had even called up the associations dialog, much less opened an archive. When I finally accessed that dialog, none of the file types were checked. They were not actually associated in the registry, either, but the keys for the file type extensions had been created automatically, and as I mentioned, those keys contained no data.
Certainly no harm done, and I actually like Bandizip very much, but if a program is portable, it shouldn't be leaving stuff behind in the registry. I once saw the same kind of behavior in a mobile media player (forgot the name). As soon as I installed it (the conventional way) on my Windows Mobile PDA, my registry magically acquired keys for zillions of media types I'd never even heard of, and I hadn't even opened a single file in the app yet. I didn't like the player, anyway, but when I uninstalled it the keys remained, and I had to clean up the registry manually.