Katie.exe should be stored in a directory that is added to the PATH
environment variable. This can either be system-wide, or for the current process only.
PATH
in case it is not added yet. This should be done in two places. One is ham/startham.bat and in the environment variables configuration inside VisualHAM. Once you added the "ham/tools/win32" to the places mentioned, you can run katie by using the HAM shell (ham/startham.bat) or from the command-line located in VisualHAM in the main menu under "External Tools -> Command Prompt".PATH
environment variable automatically during DevKitPro setup and so no further steps are neccessary.