update Readme
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## Customization
-The default configuration file is stored in `src/main/resources/exportPlugin.conf`.
-This file can be overwritten, when a file of that name is stored in the
-same directory as the jar file.
+The basic configuration file is stored in `src/main/resources/exportPlugin.conf`.
+To change the configuration create a new config file and run the jar with the
+according filename as argument:
-
+```shell
+$ java -jar KalamarExportPlugin-[VERSION].jar myconf_exportPlugin.conf
+```
## License
Copyright (c) 2020-2021, [IDS Mannheim](https://www.ids-mannheim.de/), Germany