diff --git a/helper/psd/arrow-left.psd b/helper/psd/arrow-left.psd
deleted file mode 100644
index 91c862d..0000000
Binary files a/helper/psd/arrow-left.psd and /dev/null differ
diff --git a/helper/psd/arrow-right.psd b/helper/psd/arrow-right.psd
deleted file mode 100644
index 3314dfe..0000000
Binary files a/helper/psd/arrow-right.psd and /dev/null differ
diff --git a/helper/tools/compress.js b/helper/tools/compress.js
deleted file mode 100644
index b000f8c..0000000
--- a/helper/tools/compress.js
+++ /dev/null
@@ -1,24 +0,0 @@
-var fs = require("fs"),
-exec = require("child_process").exec;
-// js compress
-var jsPaths = ["neoease"];
-for (var i = 0; i < jsPaths.length; i++) {
-	var content = "";
-	exec("uglifyjs ../../" + jsPaths[i] + "/js/" + jsPaths[i] + ".js > ../../" + jsPaths[i] + "/js/" + jsPaths[i] + ".min.js", function (error, stdout, stderr) {
-		if (error !== null) {
-			console.log(error);
-		} 	
-	});
-}
-
-// css compress
-var skinsCsses = ["andrea", "classic", "community", "favourite", "i-nove", "neoease", "owmx-3.0", "tree-house"];
-
-for (var i = 0; i < skinsCsses.length; i++) {
-	var content = "";
-	exec("lessc -compress ../../" + skinsCsses[i] + "/css/" + skinsCsses[i] + ".css > ../../" + skinsCsses[i] + "/css/" + skinsCsses[i] + ".min.css", function (error, stdout, stderr) {
-		if (error !== null) {
-			console.log(error);
-		} 	
-	});
-}
\ No newline at end of file
diff --git a/helper/tools/update-version.js b/helper/tools/update-version.js
deleted file mode 100644
index 653e6c9..0000000
--- a/helper/tools/update-version.js
+++ /dev/null
@@ -1,22 +0,0 @@
-var version = "",
-newVersion = "";
-
-process.argv.forEach(function (val, index, array) {  
-	if (index === 2) {
-		version = val;
-	}
-
-	if (index === 3) {
-		newVersion = val;
-	}
-});  
-
-var fs = require("fs");
-var skins = ["andrea", "classic", "community", "favourite", "i-nove", "neoease", "owmx-3.0", "tree-house"];
-
-for (var i = 0; i < skins.length; i++) {
-	var fileName = "../../" + skins[i] + "/skin.properties";
-
-	var file = fs.readFileSync(fileName, "UTF-8");
-	fs.writeFileSync(fileName, file.replace("forSolo=" + version, "forSolo=" + newVersion), "UTF-8");
-}
\ No newline at end of file
diff --git a/helper/skin-preview/Mobile.png b/skin-preview/Mobile.png
similarity index 100%
rename from helper/skin-preview/Mobile.png
rename to skin-preview/Mobile.png
diff --git a/helper/skin-preview/andrea.png b/skin-preview/andrea.png
similarity index 100%
rename from helper/skin-preview/andrea.png
rename to skin-preview/andrea.png
diff --git a/helper/skin-preview/classic.png b/skin-preview/classic.png
similarity index 100%
rename from helper/skin-preview/classic.png
rename to skin-preview/classic.png
diff --git a/helper/skin-preview/community.png b/skin-preview/community.png
similarity index 100%
rename from helper/skin-preview/community.png
rename to skin-preview/community.png
diff --git a/helper/skin-preview/ease.png b/skin-preview/ease.png
similarity index 100%
rename from helper/skin-preview/ease.png
rename to skin-preview/ease.png
diff --git a/helper/skin-preview/favourite.png b/skin-preview/favourite.png
similarity index 100%
rename from helper/skin-preview/favourite.png
rename to skin-preview/favourite.png
diff --git a/helper/skin-preview/i-nove.png b/skin-preview/i-nove.png
similarity index 100%
rename from helper/skin-preview/i-nove.png
rename to skin-preview/i-nove.png
diff --git a/helper/skin-preview/neoease.png b/skin-preview/neoease.png
similarity index 100%
rename from helper/skin-preview/neoease.png
rename to skin-preview/neoease.png
diff --git a/helper/skin-preview/owmx-3.0.png b/skin-preview/owmx-3.0.png
similarity index 100%
rename from helper/skin-preview/owmx-3.0.png
rename to skin-preview/owmx-3.0.png
diff --git a/helper/skin-preview/tree-house.png b/skin-preview/tree-house.png
similarity index 100%
rename from helper/skin-preview/tree-house.png
rename to skin-preview/tree-house.png