Notes about the D2X file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The D2X file type is primarily associated with 'Diablo II'. ATMA is a Single Player muling program for Diablo II by Hakai_no_Tenshi. It stands for "A Tenshi Muling Application" and is designed to let you organize and categorize your Diablo II characters, mules and items. The .D2X file is not used by the game; it is a storage file for stash.