我找到了一个方法。更改wordpress表单管理器插件目录->类型->文件上的行。php（第109行附近）

发件人：

if($fileNameFormat == "%filename%"){
    $newFileName = $pathInfo[\'filename\'];
}

if($fileNameFormat == "%filename%"){
//Sanitize the filename (See note below)
    $remove_these = array(\' \',\'`\',\'"\',\'\\\'\',\'\\\\\',\'/\',\'%\');
    $newFileName = str_replace($remove_these, \'\', $pathInfo[\'filename\']);
//Make the filename unique
    $newFileName = time().\'-\'.$newFileName;                 
}