IntentReciver leak in SettingsActivity

[anlalalu]

Reproduction Steps

1. tap 'more options'
2. tap 'settings'
3. push 'back'

Stack trace

E/ActivityThread: Activity org.openbmap.activities.SettingsActivity has leaked IntentReceiver org.openbmap.activities.DialogPreferenceCatalogs$1@529f90bc that was originally registered here. Are you missing a call to unregisterReceiver()?
android.app.IntentReceiverLeaked: Activity org.openbmap.activities.SettingsActivity has leaked IntentReceiver org.openbmap.activities.DialogPreferenceCatalogs$1@529f90bc that was originally registered here. Are you missing a call to unregisterReceiver()?
at android.app.LoadedApk$ReceiverDispatcher.(LoadedApk.java:796)
at android.app.LoadedApk.getReceiverDispatcher(LoadedApk.java:597)
at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1446)
at android.app.ContextImpl.registerReceiver(ContextImpl.java:1426)
at android.app.ContextImpl.registerReceiver(ContextImpl.java:1420)
at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:467)
at org.openbmap.activities.DialogPreferenceCatalogs.initDownloadManager(DialogPreferenceCatalogs.java:148)
at org.openbmap.activities.DialogPreferenceCatalogs.(DialogPreferenceCatalogs.java:89)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.preference.GenericInflater.createItem(GenericInflater.java:383)
at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:430)
at android.preference.GenericInflater.rInflate(GenericInflater.java:481)
at android.preference.GenericInflater.rInflate(GenericInflater.java:493)
at android.preference.GenericInflater.inflate(GenericInflater.java:326)
at android.preference.GenericInflater.inflate(GenericInflater.java:263)
at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:272)
at android.preference.PreferenceActivity.addPreferencesFromResource(PreferenceActivity.java:1472)
at org.openbmap.activities.SettingsActivity.onCreate(SettingsActivity.java:80)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)

E/ActivityThread: Activity org.openbmap.activities.SettingsActivity has leaked IntentReceiver org.openbmap.activities.DialogPreferenceMaps$1@52a4880c that was originally registered here. Are you missing a call to unregisterReceiver()?
android.app.IntentReceiverLeaked: Activity org.openbmap.activities.SettingsActivity has leaked IntentReceiver org.openbmap.activities.DialogPreferenceMaps$1@52a4880c that was originally registered here. Are you missing a call to unregisterReceiver()?
at android.app.LoadedApk$ReceiverDispatcher.(LoadedApk.java:796)
at android.app.LoadedApk.getReceiverDispatcher(LoadedApk.java:597)
at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1446)
at android.app.ContextImpl.registerReceiver(ContextImpl.java:1426)
at android.app.ContextImpl.registerReceiver(ContextImpl.java:1420)
at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:467)
at org.openbmap.activities.DialogPreferenceMaps.initDownloadManager(DialogPreferenceMaps.java:151)
at org.openbmap.activities.DialogPreferenceMaps.(DialogPreferenceMaps.java:91)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.preference.GenericInflater.createItem(GenericInflater.java:383)
at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:430)
at android.preference.GenericInflater.rInflate(GenericInflater.java:481)
at android.preference.GenericInflater.rInflate(GenericInflater.java:493)
at android.preference.GenericInflater.inflate(GenericInflater.java:326)
at android.preference.GenericInflater.inflate(GenericInflater.java:263)
at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:272)
at android.preference.PreferenceActivity.addPreferencesFromResource(PreferenceActivity.java:1472)
at org.openbmap.activities.SettingsActivity.onCreate(SettingsActivity.java:80)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)

Debug info

App Version = 0.8.18

Android Version = 4.4.4