fix: download xml

Author: Pek5892

modules/fatture/src/Fattura.php

@@ -541,7 +541,7 @@ public function isFE()
     {
         $file = $this->getFatturaElettronica();
 
-        return !empty($this->progressivo_invio) && $file->directory && file_exists('files/'.$file->directory);
+        return !empty($this->progressivo_invio) && $file->attachments_directory && file_exists('files/'.$file->attachments_directory);
     }
 
     /**

plugins/exportFE/download.php

@@ -21,4 +21,4 @@
 include_once __DIR__.'/init.php';
 
 $file = $fattura->getFatturaElettronica();
-download(base_dir().'/files/'.$file->directory.'/'.$file->filename, $file->original_name);
+download(base_dir().'/files/'.$file->attachments_directory.'/'.$file->filename, $file->original_name);