Wildfire 3 is almost 20 years old and no longer supported by PTC.
You didn't attach a message. Presumably it is that ptc_setvars.bat was not found? If that's the case, the first thing I'd try is to see if you can find that file on the old computer. From what I was able to google about it it's a batch file that sets the environment variables that are necessary to run Pro/Engineer. Makes sense, given the name.
If you can find that file on the new computer, then most likely there's something wrong with the path designation in the user's environment, so the system can't find that particular batch file. You might need to change the environment variable for the path to include the directory where ptc_setvars.bat is located.
Other than that, not much we, users of the software but not that antique of a version, will be able to do.
