Notes about the DTR 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 DTR file type is primarily associated with 'DiagTransfer' by alain Blaisot. DiagTransfer is a program that allows you to transfer chess diagrams. .DTR files are a special DiagTransfer format; the program can also output FEN or EPD formats as well as pure graphics.