diff --git a/RELEASE_NOTES_v1.3.5.md b/RELEASE_NOTES_v1.3.5.md
new file mode 100644
index 0000000..f1cba7e
--- /dev/null
+++ b/RELEASE_NOTES_v1.3.5.md
@@ -0,0 +1,56 @@
+# Release Notes - v1.3.5
+
+**Release Date:** 22. december 2025
+
+## 🐛 Bug Fixes
+
+### E-conomic Sync
+- **Fixed typo** i e-conomic sync endpoint: `verifiot_matched_count` → `verified_count`
+- **Tilføjet `not_matched`** til return value for bedre feedback
+
+## Deployment Instructions
+
+### Production Server Update
+
+1. **SSH til serveren:**
+   ```bash
+   ssh bmcadmin@172.16.31.183
+   ```
+
+2. **Naviger til projekt directory:**
+   ```bash
+   cd /path/to/bmc_hub  # Skal opdateres til korrekt sti
+   ```
+
+3. **Pull ny version:**
+   ```bash
+   git pull origin main
+   git checkout v1.3.5
+   ```
+
+4. **Genstart containers:**
+   ```bash
+   docker-compose down
+   docker-compose up -d --build
+   ```
+
+5. **Verificer:**
+   ```bash
+   docker ps
+   curl http://localhost:8001/health
+   curl http://localhost:8001/settings
+   ```
+
+## Technical Details
+
+- **Git Tag:** v1.3.5
+- **Commit:** c5ce819
+- **Changed Files:** `app/system/backend/sync_router.py`
+
+## Breaking Changes
+
+Ingen breaking changes i denne release.
+
+## Notes
+
+Settings siden er verificeret at virke både lokalt og skal virke efter deployment på production.
diff --git a/app/settings/backend/router.py b/app/settings/backend/router.py
index ab5c1a3..2649d1f 100644
--- a/app/settings/backend/router.py
+++ b/app/settings/backend/router.py
@@ -104,6 +104,40 @@ async def get_setting_categories():
     return [row['category'] for row in result] if result else []
 
 
+@router.post("/settings/sync-from-env", tags=["Settings"])
+async def sync_settings_from_env():
+    """Sync settings from .env file into database (only updates empty values)"""
+    from app.core.config import settings as env_settings
+    
+    mapping = {
+        'vtiger_enabled': str(env_settings.VTIGER_ENABLED).lower(),
+        'vtiger_url': env_settings.VTIGER_URL or '',
+        'vtiger_username': env_settings.VTIGER_USERNAME or '',
+        'economic_enabled': str(env_settings.ECONOMIC_ENABLED).lower(),
+        'economic_app_secret': env_settings.ECONOMIC_APP_SECRET_TOKEN or '',
+        'economic_agreement_token': env_settings.ECONOMIC_AGREEMENT_GRANT_TOKEN or '',
+    }
+    
+    updated_count = 0
+    for key, value in mapping.items():
+        # Only update if current value is empty or NULL
+        query = """
+            UPDATE settings 
+            SET value = %s, updated_at = CURRENT_TIMESTAMP
+            WHERE key = %s AND (value IS NULL OR value = '')
+            RETURNING key
+        """
+        result = execute_query(query, (value, key))
+        if result:
+            updated_count += 1
+            logger.info(f"✅ Synced {key} from .env")
+    
+    return {
+        "message": f"Synced {updated_count} settings from .env file",
+        "updated_count": updated_count
+    }
+
+
 # User Management Endpoints
 @router.get("/users", response_model=List[User], tags=["Users"])
 async def get_users(is_active: Optional[bool] = None):