Resolved gh-444 by adding the new phpspreadsheet library, and removing the old PHPExcel library.

admin/helpers/compiler/a_Get.php

@@ -411,6 +411,20 @@ class Get
 	 */
 	public $addEximport = false;
 
+	/**
+	 * The Import & Export View
+	 *
+	 * @var      array
+	 */
+	public $eximportView = array();
+
+	/**
+	 * The Import & Export Custom Script
+	 *
+	 * @var      array
+	 */
+	public $importCustomScripts = array();
+
 	/**
 	 * The Tag & History Switch
 	 *