# UnifiedFiler v1.9.1 Notes

## Purpose

v1.9.1 fixes the Google Drive navigation experience. In v1.9.0, selecting or opening a folder could call a full tree rebuild. For Google Drive, this was expensive and visually disruptive because every expanded Drive branch could be reloaded.

## Changes

- Normal navigation now refreshes only the file list.
- The active tree node is updated in place.
- The expanded tree state and scroll position are preserved during folder browsing.
- `refreshTreeOnNavigation` was added for Hosts that explicitly want the old full-rebuild behavior.

## Recommended setting

```javascript
$('#explorer').fileExplorer({
  defaultStorage: 'googleDrive',
  treeStorageMode: 'all',
  refreshTreeOnNavigation: false
});
```

This is now the default behavior.