Added "BackupDestination" to config.yml.
With this feature you can choose where your Backups should be stored. You could for example save Backups on a different storage drive than your server is running on.

You can now back up specific files, not just folders! Simply use the "/backup create" command to create a backup of a specific file. You need to specify the exact file path as follows: "/backup create plugins/Essentials/config.yml" >> to create a Backup of the "Essentials" plugin configuration file. File-Backups can be found in the "Files"-Folder located in the Backups-Folder.

Added "UpdateAvailabeMessage" to config.yml.
With this feature you can enable or disable update notification that appears when a newer version is available. I don't recommend disabling this feature as future updates may be important for the functionality of this plugin and your Backups.