diff --git a/app/index.js b/app/index.js
index 2d2b82c..23374d6 100644
--- a/app/index.js
+++ b/app/index.js
@@ -236,6 +236,20 @@ if (FILE.fileExists("userid.txt")) {
 if (typeof(token) !== "undefined") {
     OldBrowser.setContent(FILE.readFile("app\\servers.html", "utf-8"));
     getAssignedServers();
+
+    document.getElementById("btn_logout").onclick = function() {
+        if (FILE.fileExists("token.txt")) {
+            token = FILE.deleteFile("token.txt")
+        }
+        
+        if (FILE.fileExists("userid.txt")) {
+            userId = FILE.deleteFile("userid.txt");
+        }
+
+        exit(0);
+    };
+
+    document.getElementById("btn_assign").onclick = assign;
 } else {
     OldBrowser.setContent(FILE.readFile("app\\login.html", "utf-8"));
 
@@ -264,6 +278,4 @@ if (typeof(token) !== "undefined") {
             })
         ;
     };
-
-    document.getElementById("btn_assign").onclick = assign;
 }
diff --git a/lib/oldbrowser.js b/lib/oldbrowser.js
index 9455d3a..291e804 100644
--- a/lib/oldbrowser.js
+++ b/lib/oldbrowser.js
@@ -229,7 +229,6 @@ exports.start = function(callback) {
 
     // load additional libraries
     if (IEVersion < 10) {
-        exports.addScript("app/assets/js/PIE-1.0.0.js");
         exports.addScript("app/assets/js/jquery.html5-placeholder-shim-5a87f05.js");
     }
 };
diff --git a/token.txt b/token.txt
deleted file mode 100644
index 4ad3420..0000000
--- a/token.txt
+++ /dev/null
@@ -1 +0,0 @@
-eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6MSwiZXhwIjoxNjA1MTUwMTg2LCJ0dGwiOjIwLCJ0eXBlIjoiYXV0aCIsImtleSI6Ijg1N2NlZDg1LTMzOWEtNDViNS04YTQ5LTJjOGM0YmE4ZDVmNCIsInByb2plY3QiOiJuZXRzb2xpZCJ9.w8lGq8Zo29XoUYII2D8hnI5kSGLcGEx4hiMHgIfVUlY
\ No newline at end of file
diff --git a/userid.txt b/userid.txt
deleted file mode 100644
index 56a6051..0000000
--- a/userid.txt
+++ /dev/null
@@ -1 +0,0 @@
-1
\ No newline at end of file