I tried to load the Cruciverb word list on Crossfire on a Windows 10 PC. The Crossfire manual does not provide clear documentation. Had to do some legwork to find a solution. Thought I'd post the results of my effort here.
The problem: The Cruciverb word list is a text file (xxx.txt). Crossfire requires it to be xxx.dict.
Apparently, the content of files with .txt and .dict are interchangeable. The workaround is to change the file extension from .txt to .dict. This can be done in File Explorer*.
After changing the file extension to .dict: In Crossfire, Dictionary, Add, then browse to the newly named xxx.dict file and press Add. The xxx.dict file will be added to the dictionary.
Hope this helps other novices like me!
*(Note: the file extension name may be hidden. If so: Control Panel, Appearance & Personalization, Folder Options, View, File & Folders, Show hidden files, folders & drives)