public static boolean checkAndSetLegacyFilterConfigMigrated() {
        final boolean isMigrated = getBoolean(R.string.pref_legacy_filter_config_migrated, false);
        putBoolean(R.string.pref_legacy_filter_config_migrated, true);
        return isMigrated;
    }
For which connectors should attributes be shown: 1 GC, 2 Okapi, 3 Both
main/src/main/java/cgeo/geocaching/settings/Settings.java