Since I was tired of hunting the DriveSort window around the screen at each startup, I finally decided to save the last window position in the settings file. Now when you start DriveSort, it goes nicely where you left it the last time.
Next, something a bit more useful, I've added a dialog box under the Playlist/Extensions... menu to configure which file extensions can be dragged around using DriveSort's playlist mode. It saves the trouble of messing with the settings file with a text editor, and should simplify matters for those of you who download DriveSort to sort their GBA/DS roms... Anyway, since I'm not into handheld games, I've no idea which additional extensions would be useful, so I've made it a bit less of a pain for you to configure.