First any Topic files will be found in the e-Sword resource library, to access the library click the icon at the right end of the e-Sword search bar that looks like three little books. Clicking this will open the resource library window which is where you can read all topic files.
below is an image of where the icon for the resource library is located:
The file you downloaded is in an older module format and might need to be converted to the new format in order to be used. If that is the case there is a conversion tool available at the official e-Sword website at the following link:
Appreciate the help and the screenshot TJ!!!