Rollback versions?

Seeing the following errors since upgrading from 1.3 to 1.4.2 (among others – my error log has grown exponentially since this upgrade)

WordPress database error MySQL server has gone away for query SELECT option_value FROM wp_options WHERE option_name = 'backup-to-dropbox-options' LIMIT 1 made by do_action_ref_array, call_user_func_array, run_dropbox_backup, WP_Backup->execute, WP_Backup->backup_path, WP_Backup_Config->get_option, get_option

WordPress database error MySQL server has gone away for query SELECT option_value FROM wp_options WHERE option_name = 'timezone_string' LIMIT 1 made by do_action_ref_array, call_user_func_array, run_dropbox_backup, WP_Backup->execute, WP_Backup->backup_path, WP_Backup_Logger::log, current_time, get_option, apply_filters('pre_option_gmt_offset'), call_user_func_array, wp_timezone_override_offset, get_option

WordPress database error MySQL server has gone away for query SELECT option_value FROM wp_options WHERE option_name = 'gmt_offset' LIMIT 1 made by do_action_ref_array, call_user_func_array, run_dropbox_backup, WP_Backup->execute, WP_Backup->backup_path, WP_Backup_Logger::log, current_time, get_option

Are there rollback versions available somewhere so I can go back to 1.3 until 1.4.x is working properly?

http://ww.wp.xz.cn/extend/plugins/wordpress-backup-to-dropbox/