Virtually anyone has encountered some problems with opening unknown files while working on a computer. It can be very frustrating. Yet such problems, not only with D3D files, can be addressed in a standard way. Follow the steps below and we can guarantee that your problem with opening D3D will be resolved!
If given user account does not have necessary permissions to open files with D3D extension, it is highly probable that no program that supports given files is installed on the users’ system. Below is a list of actions user should pursue in order to resolve most common problems.
After the application has been installed, the system should automatically open D3D files with given application. Below is the list of relevant programs along with operating systems they are available for:
It is possible that an application that supports D3D files is not associated with such files. In such case, the program should by manually associated with D3D files (right-click on the file icon → Properties → General Tab → In submenu "Open with" and click on "Change" button. System will display a list of suggested programs that support D3D files. Choose the application by checking the box "Always use the selected application to open this kind of files". System will store this information in its registry and use it to open D3D files with the selected program.
File association for D3D files can be edited manually by editing appropriate entry in Windows System Registry. However, it is discouraged as it may introduce errors to registry if not done properly and may even damage the system.