Hoping for a workaround to use metabox plugin on wordpress version 4.0

Hi, I know that the plugin officially only supports 4.1 and higher but I have a site that for varying reasons cannot at the moment upgrade to a later version. I have installed the metabox plugin and it installs without any problem however I cannnot get certain field types to work.

I was hoping that there might be a work around to get me by for the moment.

These are the fields that won't display (taken from your demo.php)

Thanks in advance

            /*// IMAGE UPLOAD
            array(
                'name' => esc_html__( 'Image Upload', 'your-prefix' ),
                'id'   => "{$prefix}image",
                'type' => 'image',
            ),
            // FILE UPLOAD
            array(
                'name' => esc_html__( 'File Upload', 'your-prefix' ),
                'id'   => "{$prefix}file",
                'type' => 'file',
            ),
            // POST
            array(
                'name'        => esc_html__( 'Posts (Pages)', 'your-prefix' ),
                'id'          => "{$prefix}pages",
                'type'        => 'post',
                // Post type
                'post_type'   => 'page',
                // Field type, either 'select' or 'select_advanced' (default)
                'field_type'  => 'select_advanced',
                'placeholder' => esc_html__( 'Select an Item', 'your-prefix' ),
                // Query arguments (optional). No settings means get all published posts
                'query_args'  => array(
                    'post_status'    => 'publish',
                    'posts_per_page' => - 1,
                ),
            ),
            // SELECT ADVANCED BOX
            array(
                'name'        => esc_html__( 'Select', 'your-prefix' ),
                'id'          => "{$prefix}select_advanced",
                'type'        => 'select_advanced',
                // Array of 'value' => 'Label' pairs for select box
                'options'     => array(
                    'value1' => esc_html__( 'Label1', 'your-prefix' ),
                    'value2' => esc_html__( 'Label2', 'your-prefix' ),
                ),
                // Select multiple values, optional. Default is false.
                'multiple'    => false,
                // 'std'         => 'value2', // Default value, optional
                'placeholder' => esc_html__( 'Select an Item', 'your-prefix' ),
            ),
            // AUTOCOMPLETE
            array(
                'name'    => esc_html__( 'Autocomplete', 'your-prefix' ),
                'id'      => "{$prefix}autocomplete",
                'type'    => 'autocomplete',
                // Options of autocomplete, in format 'value' => 'Label'
                'options' => array(
                    'value1' => esc_html__( 'Label1', 'your-prefix' ),
                    'value2' => esc_html__( 'Label2', 'your-prefix' ),
                ),
                // Input size
                'size'    => 30,
                // Clone?
                'clone'   => false,
            ),
            // COLOR
            array(
                'name' => esc_html__( 'Color picker', 'your-prefix' ),
                'id'   => "{$prefix}color",
                'type' => 'color',
            ),
            // CHECKBOX LIST
            array(
                'name'    => esc_html__( 'Checkbox list', 'your-prefix' ),
                'id'      => "{$prefix}checkbox_list",
                'type'    => 'checkbox_list',
                // Options of checkboxes, in format 'value' => 'Label'
                'options' => array(
                    'value1' => esc_html__( 'Label1', 'your-prefix' ),
                    'value2' => esc_html__( 'Label2', 'your-prefix' ),
                ),
            ),*/
            /*// DATE
            array(
                'name'       => esc_html__( 'Date picker', 'your-prefix' ),
                'id'         => "{$prefix}date",
                'type'       => 'date',
                // jQuery date picker options. See here http://api.jqueryui.com/datepicker
                'js_options' => array(
                    'appendText'      => esc_html__( '(yyyy-mm-dd)', 'your-prefix' ),
                    'dateFormat'      => esc_html__( 'yy-mm-dd', 'your-prefix' ),
                    'changeMonth'     => true,
                    'changeYear'      => true,
                    'showButtonPanel' => true,
                ),
            ),
            // DATETIME
            array(
                'name'       => esc_html__( 'Datetime picker', 'your-prefix' ),
                'id'         => $prefix . 'datetime',
                'type'       => 'datetime',
                // jQuery datetime picker options.
                // For date options, see here http://api.jqueryui.com/datepicker
                // For time options, see here http://trentrichardson.com/examples/timepicker/
                'js_options' => array(
                    'stepMinute'     => 15,
                    'showTimepicker' => true,
                ),
            ),*/