Update README.md

Author: dimsav

README.md

@@ -6,7 +6,8 @@ A bash script to create backups of directories and mysql databases. Optionally u
 ## How to use
 
 * Copy `config.sh.ini` to `config.sh` and fill it with your settings
-* Run `backup.sh`
+* Run `backup.sh` 
+* If dropbox is enabled, you will have to run the script one more time.
 
 Requirements: