fix file added

src/app/files/file-explorer.js

@@ -317,17 +317,22 @@ function fileExplorer (appAPI, files) {
   }
 
   function fileAdded (filepath) {
+    self.ensureRoot(() => {
       var folderpath = filepath.split('/').slice(0, -1).join('/')
+
+      var currentTree = self.treeView.nodeAt(folderpath)
+      if (currentTree) {
         self.files.resolveDirectory(folderpath, (error, fileTree) => {
           if (error) console.error(error)
           if (!fileTree) return
           fileTree = normalize(folderpath, fileTree)
           var newTree = self.treeView.renderProperties(fileTree, false)
-      var currentTree = self.treeView.nodeAt(folderpath)
           currentTree.innerHTML = ''
           ;[...newTree.children].forEach(child => currentTree.appendChild(child))
         })
       }
+    })
+  }
 }
 
 /*