updates readme with corrected install-command

README.md

@@ -1,20 +1,22 @@
 # Kibana Extended Metric Plugin
 
-This is a plugin for [Kibana 5.0.0+](https://www.elastic.co/products/kibana).
+This is a plugin for [Kibana 5.0.0](https://www.elastic.co/products/kibana).
 It is based on the core Metric-Plugin but gives you the ability to output custom aggregates on metric-results by using custom formula and/or JavaScript.
 
 ![image](img/demo.gif)
 
 ## Installation
+(only works for Kibana 5.0.0)
 
 ```sh
-$ ./bin/kibana-plugin install https://github.com/ommsolutions/kibana_ext_metrics_vis/archive/0.1.0.zip
+$ ./bin/kibana-plugin install https://github.com/ommsolutions/kibana_ext_metrics_vis/releases/download/0.1.0/extended_metric_vis.zip
 ```
 
 ### Manual
+(for other versions: e.g. 5.1.0)
 
 Extract the ZIP into a new folder in your `kibana/plugins`-directory.
 
 ## Uninstall
 
-Simply delete that folder and restart kibana.
+Simply delete that folder and restart kibana.