^^&&^^

Edit File: FileManagerHelper.php

<?php

defined('ABSPATH') || exit;

if(!class_exists('FileManagerHelper')):

class FileManagerHelper{
	
	public function getArrMimeTypes()
	{
		$arrMimeTypes = array (
			//text
			'.txt' => 'text/plain',
			'.htm' => 'text/html',
			'.html' => 'text/html',
			'.php' => 'text/x-php',
			'.css' => 'text/css',
			'.csv' => 'text/csv',
			'.js' => 'text/javascript',
			'.json' => 'application/json',
			'.xml' => 'text/xml',
			'.ics' => 'text/calendar',

//font
			'.woff' => 'font/woff,application/font-woff,application/x-font-opentype,application/x-font-truetype,application/vnd.ms-fontobject',
			'.woff2' => 'font/woff2',
			'.ttf' => 'application/x-font-ttf,font/ttf',
			'.otf' => 'font/otf',
			'.sfnt' => 'font/sfnt,application/font-sfnt',

// images
			'.png' => 'image/png',
			'.jpe' => 'image/jpeg',
			'.jpg' => 'image/jpeg',
			'.jpeg' => 'image/jpeg',
			'.jpg' => 'image/jpeg',
			'.gif' => 'image/gif',
			'.bmp' => 'image/bmp',
			'.ico' => 'image/vnd.microsoft.icon,image/x-icon',
			'.tiff' => 'image/tiff',
			'.tif' => 'image/tiff',
			'.svg' => 'image/svg+xml',
			'.svgz' => 'image/svg+xml',

// archives
			'.zip' => 'application/zip',
			'.rar' => 'application/x-rar-compressed',
			'.exe' => 'application/x-msdownload',
			'.msi' => 'application/x-msdownload',
			'.cab' => 'application/vnd.ms-cab-compressed',
			'.tar' => 'application/x-tar',
			'.gz' => 'application/x-gzip',
			'.bz2' => 'application/x-bzip2',
			'.7z' => 'application/x-7z-compressed',

// audio
			'.mp3' => 'audio/mpeg',
			'.mp4a' => 'audio/mp4',
			'.mpega' => 'audio/mpeg',
			'.mpga' => 'audio/mpeg',
			'.aac' => 'audio/x-aac',
			'.m3u' => 'audio/x-mpegurl',
			'.mpa' => 'audio/mpeg',
			'.wav' => 'audio/x-wav',
			'.wma' => 'audio/x-ms-wma',

//video
			'.flv' => 'video/x-flv',
			'.qt' => 'video/quicktime',
			'.mov' => 'video/quicktime',
			'.avi' => 'video/x-msvideo',
			'.mp4' => 'video/mp4',
			'.mpeg' => 'video/mpeg',
			'.mpg' => 'video/mpeg',
			'.wmv' => 'video/x-ms-wmv',
			'.mpav' => 'video/mpeg',
			'.swf' => 'application/x-shockwave-flash',
			
			// adobe
			'.pdf' => 'application/pdf',
			'.psd' => 'image/vnd.adobe.photoshop',
			'.ai' => 'application/postscript',
			'.eps' => 'application/postscript',
			'.ps' => 'application/postscript',

// ms office
			'.doc' => 'application/msword',
			'.rtf' => 'application/rtf',
			'.xls' => 'application/vnd.ms-excel',
			'.ppt' => 'application/vnd.ms-powerpoint',
			'.docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
			'.pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
			'.xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
			'.xlsb' => 'application/vnd.ms-excel.sheet.binary.macroenabled.12',
			'.xlsm' => 'application/vnd.ms-excel.sheet.macroenabled.12',
			'.dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
			'.xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
			'.potx' => 'application/vnd.openxmlformats-officedocument.presentationml.template',
			'.ppsx' => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
			'.sldx' => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
			
			// open office
			'odt' => 'application/vnd.oasis.opendocument.text',
			'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
		);
		return $arrMimeTypes;
	}
	
	public function madeStripcslashesFile($cmd, &$args, $elfinder, $volume)
	{
		$args['content'] = stripcslashes($args['content']);
		return true;
	}
}

endif;