Drop Dropbox used to open files with default apps without the preview function. That functionality has since been removed. That functionality was very helpful to those of us using atypical files such as the CBR files consisting of zipped images that can be opened with a specific viewer. The current version of Dropbox does not allow that and takes me to a "preview can't be opened" screen. I then need to go to several other screens to actually open the file. I would like the functionality to be restored. I know this problem affects users of other file types as well.