Your MySQL details are stored in `data/config.php`. This file doesn't exist until you installed Lychee. If you need to change your connection details, you can edit this file manually.
All settings are stored in the database. You can change the properties manually, but we recommend to use the menu in Lychee. You can find this menu on the top left corner after you signed in. Some of these settings are only changeable directly in the database.
This key is required to use the Dropbox import feature from your server. Lychee will ask you for this key, the first time you try to use the import. You can get your personal drop-ins app key from [their website](https://www.dropbox.com/developers/apps/create).
If `1`, Lychee will use Imagick when available. Disable [Imagick](http://www.imagemagick.org) if you have problems or if you are using an outdated version. Lychee will use [GD](http://php.net/manual/en/book.image.php) when Imagick is disabled or not available.