function amr_check_for_upgrades()
{
    // NB must be in order of the oldest changes first // called from ausers_get_option
    // should already have values then - and will not be new ?
    global $amain, $aopt;
    if (empty($amain)) {
        $amain = ausers_get_option('amr-users-main');
    }
    //if (WP_DEBUG) echo '<div class="message">Debug mode: check doing upgrade check </div>';
    // must be in admin and be admin
    if (!is_admin() or !current_user_can('manage_options')) {
        return;
    }
    // handle a series of updates in order
    if (!isset($amain['version'])) {
        $amain['version'] = '0';
    }
    // really old?
    if (version_compare($amain['version'], AUSERS_VERSION, '=')) {
        return;
    }
    // if same version, don't repeat check
    $prev = $amain['version'];
    echo PHP_EOL . '<div class="updated"><p>';
    // closing div at end
    printf(__('Previous version was %s. ', 'amr-users'), $prev);
    _e('New version activated. ', 'amr-users');
    _e('We may need to process some updates.... checking now... ', 'amr-users');
    // do old changes first - user may not have updated for a while....
    if (!isset($amain['version']) or version_compare($amain['version'], '3.1', '<')) {
        // convert old options from before 3.1
        echo '<br />';
        printf(__('Prev version less than %s', 'amr-users'), '3.1.');
        if (!isset($amain['csv_text'])) {
            $amain['csv_text'] = '<img src="' . plugins_url('amr-users/images/file_export.png') . '" alt="' . __('Csv', 'amr-users') . '"/>';
        }
        if (!isset($amain['refresh_text'])) {
            $amain['refresh_text'] = '<img src="' . plugins_url('amr-users/images/rebuild.png') . '" alt="' . __('Refresh user list cache', 'amr-users') . '"/>';
        }
        ausers_update_option('amr-users-main', $amain);
        echo '<br />' . __('Image links updated.', 'amr-users');
        echo '</p>';
    }
    //
    if (!isset($amain['version']) or version_compare($amain['version'], '3.3.1', '<')) {
        // check for before 3.3.1
        echo '<br />';
        printf(__('Prev version less than %s', 'amr-users'), '3.3.1.');
        $c = new adb_cache();
        $c->deactivate();
        if (!ameta_cache_enable() or !ameta_cachelogging_enable()) {
            echo '<h2>' . __('Problem creating amr user DB tables', 'amr-users') . '</h2>';
        }
        echo '<br />';
        _e('Cacheing tables recreated.', 'amr-users');
    }
    //
    if (!isset($amain['version']) or version_compare($amain['version'], '3.3.6', '<')) {
        // check for before 3.3.6,
        echo '<br />';
        printf(__('Prev version less than %s', 'amr-users'), '3.3.6. ');
        echo '</p>' . __('Minor sub option name change for avatar size', 'amr-users') . '</p>';
        if (!empty($amain['avatar-size'])) {
            $amain['avatar_size'] = $amain['avatar-size'];
        } else {
            $amain['avatar_size'] = '16';
        }
        unset($amain['avatar-size']);
        ausers_update_option('amr-users-main', $amain);
    }
    // 3.4.4  July 2012
    if (!isset($amain['version']) or version_compare($amain['version'], '3.4.4', '<')) {
        // check for before 3.3.,
        echo '<br />';
        printf(__('Prev version less than %s', 'amr-users'), '3.4.4 ');
        echo '<p><b>' . __('New Pagination option default to yes for all lists.', 'amr-users') . '</b></p>';
        if (!isset($amain['show_pagination'])) {
            foreach ($amain['names'] as $i => $n) {
                $amain['show_pagination'][$i] = true;
            }
        }
    }
    $amain['version'] = AUSERS_VERSION;
    ausers_update_option('amr-users-main', $amain);
    // was 'amr-users-no-lists'
    echo '<p>' . __('Finished Update Checks', 'amr-users') . ' ';
    echo ' <a href="http://wordpress.org/extend/plugins/amr-users/changelog/">' . __('Please read the changelog', 'amr-users') . '</a>';
    echo '</p>' . PHP_EOL;
    echo '<br />' . __('As a precaution we will now rebuild the nice names.', 'amr-users');
    echo '<br />' . __('Relax .... you won\'t lose anything.', 'amr-users');
    ameta_rebuildnicenames();
    echo '</div><!-- end updated -->' . PHP_EOL;
}
function amr_meta_nice_names_page()
{
    /* may be able to work generically */
    global $amr_nicenames;
    global $ausersadminurl;
    //amr_meta_main_admin_header('Find fields, make nice names' );
    amr_meta_admin_headings($plugin_page = '');
    // does the nonce check etc
    if (isset($_POST['action']) and !($_POST['action'] === "save")) {
        return;
    }
    echo PHP_EOL . '<div class="clear" style="clear:both;">&nbsp;</div>' . PHP_EOL;
    if (isset($_POST['update']) and $_POST['update'] === "Update") {
        /* Validate the input and save */
        if (amrmeta_validate_nicenames()) {
            // updates inside the function now
        } else {
            echo '<h2>' . __('Validation failed', 'amr-users') . '</h2>';
        }
    }
    if (isset($_POST['resetnice'])) {
        delete_option('amr-users-nicenames');
        // delete then rebuild
    }
    if (isset($_POST['rebuild']) or isset($_POST['resetnice'])) {
        /* Rebuild the nicenames - could take a while */
        $amr_nicenames = ameta_rebuildnicenames();
        echo '<h3>' . __('Rebuild Complete.', 'amr-users') . '</h3>';
        return;
    } else {
        amrmeta_check_find_fields();
    }
    echo alist_rebuild_names_update();
    ameta_list_nicenames_for_input($amr_nicenames);
}