diff --git a/dist-winXP/ProBackup.exe b/dist-winXP/ProBackup.exe
index 8f2cfa6..c987efb 100644
Binary files a/dist-winXP/ProBackup.exe and b/dist-winXP/ProBackup.exe differ
diff --git a/license_manager.py b/license_manager.py
index e2ad913..81cbe04 100644
--- a/license_manager.py
+++ b/license_manager.py
@@ -4,6 +4,7 @@ import subprocess
 import platform
 import os
 import base64
+import sys
 
 # Simple Secret Salt - In a real app, obfuscate this or use asymmetric keys (RSA)
 # For this level, a symmetric secret is "good enough" for basic protection.
@@ -14,6 +15,35 @@ CREATE_NO_WINDOW = 0x08000000
 
 class LicenseManager:
     @staticmethod
+    def _get_base_dir():
+        if getattr(sys, 'frozen', False):
+            return os.path.dirname(sys.executable)
+        return os.path.dirname(os.path.abspath(__file__))
+
+    @staticmethod
+    def _get_license_path():
+        return os.path.join(LicenseManager._get_base_dir(), "license.dat")
+
+    @staticmethod
+    def save_license(key):
+        try:
+            with open(LicenseManager._get_license_path(), "w") as f:
+                f.write(key.strip())
+            return True
+        except:
+            return False
+
+    @staticmethod
+    def load_license():
+        path = LicenseManager._get_license_path()
+        if not os.path.exists(path):
+            return None
+        try:
+            with open(path, "r") as f:
+                return f.read().strip()
+        except:
+            return None
+    @staticmethod
     def get_motherboard_id():
         """Gets the motherboard UUID using WMIC (Windows only)."""
         try:
diff --git a/main.py b/main.py
index cc23b7a..c28b3d2 100644
--- a/main.py
+++ b/main.py
@@ -278,8 +278,11 @@ class BackupApp(QMainWindow):
         
         # Ensure sql_tools folder exists
         self.ensure_sql_tools_folder()
+        self.settings = self.load_settings()
+        self.trial_limit = 10 # Max uses in trial mode
         
-        self.load_settings()
+        # Job Queue System
+        self.job_queue = []
         
         if self.trial_mode:
             # Check if strict limit reached immediately
@@ -1308,9 +1311,9 @@ class BackupApp(QMainWindow):
     def scheduled_backup_wrapper(self, job_id):
         # Determine if we can run
         if self.worker and self.worker.isRunning():
-             # Concurrent jobs? For now let's skip or queue?
-             # Simple approach: Skip if busy.
-             self.log(">>> Jadwal Skip (App Sibuk) untuk Job ID: {}".format(job_id))
+             # Concurrent jobs? Queue them!
+             self.log(">>> App Sibuk. Job ID {} masuk antrian.".format(job_id))
+             self.job_queue.append(job_id)
              return
              
         # --- Check Trial Limit ---
@@ -1370,6 +1373,13 @@ class BackupApp(QMainWindow):
         if hasattr(self, 'run_single_btn'):
             self.run_single_btn.setEnabled(True)
         self.log(">>> Eksekusi Selesai.")
+        
+        # Check Queue
+        if self.job_queue:
+            next_job_id = self.job_queue.pop(0)
+            self.log(">>> Memproses antrian: Job ID {}".format(next_job_id))
+            # Use QTimer to schedule it on main thread to be safe, though we are likely already on main thread slot
+            QTimer.singleShot(100, lambda: self.scheduled_backup_wrapper(next_job_id))
 
     def processing_error(self, error_msg):
         self.run_all_btn.setEnabled(True)
@@ -1378,6 +1388,12 @@ class BackupApp(QMainWindow):
         if hasattr(self, 'run_single_btn'):
             self.run_single_btn.setEnabled(True)
         self.log("!!! Kesalahan Thread: {}".format(error_msg))
+        
+        # Check Queue even on error
+        if self.job_queue:
+            next_job_id = self.job_queue.pop(0)
+            self.log(">>> Memproses antrian (setelah error): Job ID {}".format(next_job_id))
+            QTimer.singleShot(100, lambda: self.scheduled_backup_wrapper(next_job_id))
 
     # --- Tray ---
     def setup_tray(self):