# Download key and updates

Backend Booking receives updates through the official Joomla update mechanism. To allow your website to fetch them, enter your personal download key once.

## Entering the download key

1. Create your download key in your customer account on [graup-it.de](https://www.graup-it.de) (menu item *Download IDs*). One key applies per website and covers all extensions obtained through it.
2. In the backend, open *System → Update → Update Sites*.
3. Open the entry *DPCalendar Backend Booking Updates* and enter the key into the field *Download Key*.
4. Save.

<div class="callout warning" id="bkmrk-make-sure-to-paste-t">Make sure to paste the key **without leading or trailing spaces**. A space copied along with it makes the update fail with an error message ("URL rejected" or "Package download failed").

</div>## Installing updates

1. Open *System → Update → Extensions*.
2. If a new version is available, the plugin appears in the list. Select it and click *Update*.
3. Joomla downloads the package using your download key, verifies the checksum and installs the new version.

If Joomla finds no update although a new version exists, click *Check for Updates* first to refresh the cache.

## The manual route

You can also install any version by hand: download the ZIP and install it via *System → Install → Extensions*, just like the first installation. An update overwrites the existing installation and keeps your settings.

## After DPCalendar updates

The plugin uses the booking interfaces of DPCalendar. After a major DPCalendar update, a short test booking in the backend is recommended — that way you make sure both extensions still fit together. Released compatibility levels are named in the version notes.

<small>Applies to version 1.0.7.</small>

[Deutsche Fassung](https://docs.graup-it.de/link/94)