Notes about the DDT file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The DDT file type is primarily associated with 'Diagram Designer' by MeeSoft. Diagram Designer is a simple vector graphics editor for creating flowcharts, diagrams and slide shows.