diff --git a/src/gui/src/AppConfig.cpp b/src/gui/src/AppConfig.cpp
index 06f9f43d..e6d15e63 100644
--- a/src/gui/src/AppConfig.cpp
+++ b/src/gui/src/AppConfig.cpp
@@ -161,7 +161,7 @@ void AppConfig::loadSettings()
 	m_ActivateEmail = settings().value("activateEmail", "").toString();
 	m_CryptoEnabled = settings().value("cryptoEnabled", true).toBool();
 	m_AutoHide = settings().value("autoHide", false).toBool();
-	m_Serialkey = settings().value("serialKey", "").toString();
+	m_Serialkey = settings().value("serialKey", "").toString().trimmed();
 	m_lastVersion = settings().value("lastVersion", "Unknown").toString();
 	m_LastExpiringWarningTime = settings().value("lastExpiringWarningTime", 0).toInt();
 	m_ActivationHasRun = settings().value("activationHasRun", false).toBool();
diff --git a/src/gui/src/LicenseManager.cpp b/src/gui/src/LicenseManager.cpp
index cd0b6eb9..335dd821 100644
--- a/src/gui/src/LicenseManager.cpp
+++ b/src/gui/src/LicenseManager.cpp
@@ -118,7 +118,7 @@ void LicenseManager::refresh()
 			SerialKey serialKey (m_AppConfig->serialKey().toStdString());
 			setSerialKey(serialKey, true);
 		} catch (...) {
-			m_AppConfig->setSerialKey("");
+			m_AppConfig->clearSerialKey();
 			m_AppConfig->saveSettings();
 		}
 	}