You can define any number of extensions that DMC will recognize as 'usable' to open a table directly with a double-click from Windows Explorer.
You have 3 types of 'links' possible : TPS - DAT and DBF
If you rename some of your TPS files for example from .TPS to .DMC then you just have to enter this module and set this new extension type for DMC to 'see' all files ending with .DMC as in fact .TPS files and open them accordingly
Enter the 'Extensions' module from the navigation panel
You will find yourself in this screen :

Use the Main Frame's Insert button to add a new extension (all is done in Edit In Place mode)
Start by entering the type of File to link your new extension with (ONLY use 'tps' or 'dat' or 'dbf')
Then select the 'EXT' column and enter the extension to associate (for example 'dmc' WITHOUT any dot or quotes as in this example)
Now from within Windows Explorer, select any .dmc file and do a right-click on it then use the 'Open with' command and select Data Management Center in the dialog box
(you may have to use the browse button to retrieve dmc.exe from your installation directory)
From then on all the .DMC files will show in Window Explorer like DMC 'linked' and a double-click will open up DMC for you to access the File.