updated docs

docs/source/installation.rst

@@ -30,12 +30,12 @@ From sources
 Configuration
 -------------
 
-The configuration file is located at: ``~/sen2chain/config/config.cfg``
+The configuration file is located at: ``~/sen2chain_data/config/config.cfg``
 
 Configure Sentinel-2 images library
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-At first launch default folders are created in ``~/sen2chain/data``. You can change the settings by editing the configuration file.
+At first launch default folders are created in ``~/sen2chain_data/data``. You can change the settings by editing the configuration file.
 
 Sen2cor configuration
 ^^^^^^^^^^^^^^^^^^^^^