De extension is related to Download Express file. You can try to open de extension files with Download Express software.
Download Express is a software which used for downloading files via internet. The main feature of the software is it can continue the downloading process even if the internet connection is gone.
De stands for unfinished file. If this file is a video, you can try to change the extension with avi and try to view. However, if the file size is so low, it can`t be opened.
It is better to open the software and wait for files to be downloaded. You have chance to download Download Express free via various web pages.
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which page related to de file
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