Disable allowBackup, fix download-modus instruction text

android/app/src/main/AndroidManifest.xml

@@ -11,7 +11,7 @@
     <uses-feature android:name="android.hardware.usb.host" android:required="false"/>
 
     <application
-        android:allowBackup="true"
+        android:allowBackup="false"
         android:label="Atom Relay"
         android:supportsRtl="true"
         android:theme="@style/Theme.AppCompat.Light">
@@ -30,13 +30,5 @@
             android:name=".SettingsActivity"
             android:label="Instellingen"
             android:parentActivityName=".MainActivity"/>
-
-        <receiver
-            android:name=".UsbKeyReceiver"
-            android:exported="true">
-            <intent-filter>
-                <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"/>
-            </intent-filter>
-        </receiver>
     </application>
 </manifest>