diff --git a/src/settings.rs b/src/settings.rs
index 8f9a24e..9f46f64 100644
--- a/src/settings.rs
+++ b/src/settings.rs
@@ -8,64 +8,6 @@ use serialize::{
     Decodable,
 };
 
-/*
-pub static ASSET_FOLDER: &'static str = "assets";
-
-pub static WINDOW_SIZE: [u32, ..2] = [
-    (BOARD_PADDING * 2.0 + BOARD_SIZE[0]) as u32,
-    (BOARD_PADDING * 2.0 + BOARD_SIZE[1] + BOARD_OFFSET_Y) as u32,
-];
-pub static WINDOW_BACKGROUND_COLOR: [f32, ..4] = [250.0 / 255.0, 248.0 / 255.0, 239.0 / 255.0, 1.0];
-
-pub static BOARD_PADDING: f64 = 12.0;
-pub static BOARD_SIZE: [f64, ..2] = [
-    TILE_SIZE * TILE_WIDTH as f64 + TILE_PADDING * (TILE_WIDTH + 1) as f64,
-    TILE_SIZE * TILE_HEIGHT as f64 + TILE_PADDING * (TILE_HEIGHT + 1) as f64,
-];
-pub static BOARD_OFFSET_Y: f64 = 128.0;
-
-pub static TILE_WIDTH: int = 4;
-pub static TILE_HEIGHT: int = 4;
-pub static TILE_SIZE: f64 = 72.0;
-pub static TILE_PADDING: f64 = 16.0;
-pub static TILE_BACKGROUND_COLOR: [f32, ..4] = [187.0 / 255.0, 173.0 / 255.0, 160.0 / 255.0, 1.0];
-pub static TILES_COLOR: [[f32, ..4], ..10] = [
-    // empty color
-    [204.0 / 255.0, 192.0 / 255.0, 179.0 / 255.0, 1.0],
-    // 2 color
-    [238.0 / 255.0, 228.0 / 255.0, 218.0 / 255.0, 1.0],
-    // 4 color
-    [237.0 / 255.0, 224.0 / 255.0, 200.0 / 255.0, 1.0],
-    // 8 color
-    [242.0 / 255.0, 177.0 / 255.0, 121.0 / 255.0, 1.0],
-    // 16 color
-    [245.0 / 255.0, 149.0 / 255.0, 99.0 / 255.0, 1.0],
-    // 32 color
-    [246.0 / 255.0, 124.0 / 255.0, 95.0 / 255.0, 1.0],
-    // 64 color
-    [246.0 / 255.0, 94.0 / 255.0, 59.0 / 255.0, 1.0],
-    // 128 color
-    [237.0 / 255.0, 207.0 / 255.0, 114.0 / 255.0, 1.0],
-    // 256 color
-    [237.0 / 255.0, 204.0 / 255.0, 97.0 / 255.0, 1.0],
-    // 512 color
-    [237.0 / 255.0, 200.0 / 255.0, 80.0 / 255.0, 1.0],
-];
-pub static TILE_UNKNOW_COLOR: [f32, ..4] = [0.8, 0.0, 0.0, 1.0];
-pub static TILE_MOVE_TIME: f64 = 0.1;
-pub static TILE_NEW_TIME: f64 = 0.1;
-pub static TILE_COMBINE_TIME: f64 = 0.1;
-
-pub static BEST_RECT: [f64, ..4] = [284.0, BOARD_PADDING, 96.0, 48.0];
-pub static SCORE_RECT: [f64, ..4] = [284.0 - 96.0 - BOARD_PADDING, BOARD_PADDING, 96.0, 48.0];
-
-pub static LABEL_COLOR: [f32, ..4] = [187.0 / 255.0, 173.0 / 255.0, 160.0 / 255.0, 1.0];
-pub static BUTTON_COLOR: [f32, ..4] = [142.0 / 255.0, 122.0 / 255.0, 102.0 / 255.0, 1.0];
-
-pub static TEXT_DARK_COLOR: [f32, ..4] = [119.0 / 255.0, 110.0 / 255.0, 101.0 / 255.0, 1.0];
-pub static TEXT_LIGHT_COLOR: [f32, ..4] = [249.0 / 255.0, 246.0 / 255.0, 242.0 / 255.0, 1.0];
-*/
-
 static SETTING_FILENAME: &'static str = "settings.json";
 
 pub struct Settings {
@@ -279,6 +221,10 @@ impl SettingsInJson {
 
     pub fn save(&self) {
         let exe_path = self_exe_path().unwrap();
+        if exe_path.is_none() {
+            println!("WARNING: Failed to save settings: can't find exe path.");
+            return;
+        }
         let path = exe_path.join(Path::new(SETTING_FILENAME));
         let file = File::create(&path).unwrap();
         let mut writer = BufferedWriter::new(file);