From 7816edc3428f7148de1b2c4b567408b68c1d25cb Mon Sep 17 00:00:00 2001
From: SomberNight <somber.night@protonmail.com>
Date: Sat, 3 Mar 2018 00:05:57 +0100
Subject: [PATCH] fix #4003

---
 lib/plugins.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/plugins.py b/lib/plugins.py
index b3611c16..9f58611f 100644
--- a/lib/plugins.py
+++ b/lib/plugins.py
@@ -502,7 +502,8 @@ class DeviceMgr(ThreadJob, PrintError):
         info = infos[c]
         # save new label
         keystore.set_label(info.label)
-        handler.win.wallet.save_keystore()
+        if handler.win.wallet is not None:
+            handler.win.wallet.save_keystore()
         return info
 
     def scan_devices(self):