diff --git a/classes/StartupAPI.php b/classes/StartupAPI.php
index e64082f..7239119 100644
--- a/classes/StartupAPI.php
+++ b/classes/StartupAPI.php
@@ -31,7 +31,7 @@ class StartupAPI {
 	/**
 	 * @var string Startup API pre-release version string
 	 */
-	private static $pre_release_version = 'dev';
+	private static $pre_release_version = null;
 
 	/**
 	 * @var string Startup API build version string
diff --git a/users_config.sample.php b/users_config.sample.php
index 67f928c..7c58777 100644
--- a/users_config.sample.php
+++ b/users_config.sample.php
@@ -52,11 +52,22 @@
  */
 #UserConfig::$requireVerifiedEmail = true;
 
+/**
+ * StartupAPI theme
+ */
+#UserConfig::$theme = 'awesome'; // uncomment to enable Bootstrap3-based theme
+
 /*
  * Uncomment next line to enable debug messages in error_log
  */
 #UserConfig::$DEBUG = true;
 
+/**
+ * Enables developer tools beyond simple debugging
+ * like Bootswatch theme switcher in 'awesome' theme, for example
+ */
+#UserConfig::$DEVMODE = TRUE;
+
 /**
  * Username and password registration configuration
  * just have these lines or comment them out if you don't want regular form registration