Replace "folder" with "directory" in config.php
diff --git a/application/config/config.php b/application/config/config.php
index 85d8da0..ba6867f 100644
--- a/application/config/config.php
+++ b/application/config/config.php
@@ -223,7 +223,7 @@
 |--------------------------------------------------------------------------
 |
 | Leave this BLANK unless you would like to set something other than the default
-| application/logs/ folder. Use a full server path with trailing slash.
+| application/logs/ directory. Use a full server path with trailing slash.
 |
 */
 $config['log_path'] = '';
@@ -259,7 +259,7 @@
 |--------------------------------------------------------------------------
 |
 | Leave this BLANK unless you would like to set something other than the default
-| application/views/errors/ folder.  Use a full server path with trailing slash.
+| application/views/errors/ directory.  Use a full server path with trailing slash.
 |
 */
 $config['error_views_path'] = '';
@@ -270,7 +270,7 @@
 |--------------------------------------------------------------------------
 |
 | Leave this BLANK unless you would like to set something other than the default
-| application/cache/ folder.  Use a full server path with trailing slash.
+| application/cache/ directory.  Use a full server path with trailing slash.
 |
 */
 $config['cache_path'] = '';