public static File getGhidraDefaultInstallDir() {
		IPreferenceStore prefs = Activator.getDefault().getPreferenceStore();
		String ghidraDefaultInstallDirPath = prefs.getString(GHIDRA_DEFAULT_INSTALL_PATH);
		if (ghidraDefaultInstallDirPath.isEmpty()) {
			return null;
		}
		return new File(ghidraDefaultInstallDirPath);
	}
Gets the default Ghidra installation directory that's defined in the preferences.

@return The default Ghidra installation directory that's defined in the preferences.
  Could be null if a default is not defined.
GhidraBuild/EclipsePlugins/GhidraDev/GhidraDevPlugin/src/main/java/ghidradev/ghidraprojectcreator/preferences/GhidraProjectCreatorPreferences.java