diff --git a/build.gradle b/build.gradle
index 36c89ef..2fe023d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -69,16 +69,16 @@ android {
     ignore 'InvalidVectorPath'
   }
 
-  def signingPropertiesFile = rootProject.file('keystore.properties')
-  if (signingPropertiesFile.exists()) {
-    def signingProperties = new Properties()
-    signingProperties.load(signingPropertiesFile.newDataInputStream())
+  def keystorePropertiesFile = rootProject.file('keystore.properties')
+  if (keystorePropertiesFile.exists()) {
+    def keystoreProperties = new Properties()
+    keystoreProperties.load(keystorePropertiesFile.newDataInputStream())
 
     def signing = [
-      storeFile: signingProperties['store.file'],
-      storePassword: signingProperties['store.password'],
-      keyAlias: signingProperties['key.alias'],
-      keyPassword: signingProperties['key.password']
+      storeFile: keystoreProperties['store.file'],
+      storePassword: keystoreProperties['store.password'],
+      keyAlias: keystoreProperties['key.alias'],
+      keyPassword: keystoreProperties['key.password']
     ]
 
     if (!signing.any { _, v -> v == null }) {
diff --git a/src/main/kotlin/nya/kitsunyan/foxydroid/MainApplication.kt b/src/main/kotlin/nya/kitsunyan/foxydroid/MainApplication.kt
index ed703e9..defef14 100644
--- a/src/main/kotlin/nya/kitsunyan/foxydroid/MainApplication.kt
+++ b/src/main/kotlin/nya/kitsunyan/foxydroid/MainApplication.kt
@@ -29,9 +29,9 @@ import java.net.Proxy
 
 @Suppress("unused")
 class MainApplication: Application() {
-  private fun PackageInfo.toInstalledItem(): InstalledItem? {
+  private fun PackageInfo.toInstalledItem(): InstalledItem {
     val signatureString = singleSignature?.let(Utils::calculateHash).orEmpty()
-    return InstalledItem(packageName, versionName, versionCodeCompat, signatureString)
+    return InstalledItem(packageName, versionName.orEmpty(), versionCodeCompat, signatureString)
   }
 
   override fun attachBaseContext(base: Context) {
@@ -46,10 +46,52 @@ class MainApplication: Application() {
     ProductPreferences.init(this)
     RepositoryUpdater.init(this)
     listenApplications()
+    listenPreferences()
 
     Coil.setImageLoader(ImageLoader.Builder(this)
       .callFactory(CoilDownloader.Factory(Cache.getImagesDir(this))).build())
 
+    if (databaseUpdated) {
+      forceSyncAll()
+    }
+
+    Cache.cleanup(this)
+    updateSyncJob()
+  }
+
+  private fun listenApplications() {
+    registerReceiver(object: BroadcastReceiver() {
+      override fun onReceive(context: Context, intent: Intent) {
+        val packageName = intent.data?.let { if (it.scheme == "package") it.schemeSpecificPart else null }
+        if (packageName != null) {
+          when (intent.action.orEmpty()) {
+            Intent.ACTION_PACKAGE_ADDED,
+            Intent.ACTION_PACKAGE_REMOVED -> {
+              val packageInfo = try {
+                packageManager.getPackageInfo(packageName, Android.PackageManager.signaturesFlag)
+              } catch (e: Exception) {
+                null
+              }
+              if (packageInfo != null) {
+                Database.InstalledAdapter.put(packageInfo.toInstalledItem())
+              } else {
+                Database.InstalledAdapter.delete(packageName)
+              }
+            }
+          }
+        }
+      }
+    }, IntentFilter().apply {
+      addAction(Intent.ACTION_PACKAGE_ADDED)
+      addAction(Intent.ACTION_PACKAGE_REMOVED)
+      addDataScheme("package")
+    })
+    val installedItems = packageManager.getInstalledPackages(Android.PackageManager.signaturesFlag)
+      .map { it.toInstalledItem() }
+    Database.InstalledAdapter.putAll(installedItems)
+  }
+
+  private fun listenPreferences() {
     updateProxy()
     var lastAutoSync = Preferences[Preferences.Key.AutoSync]
     var lastUpdateUnstable = Preferences[Preferences.Key.UpdateUnstable]
@@ -70,40 +112,6 @@ class MainApplication: Application() {
         }
       }
     }
-
-    if (databaseUpdated) {
-      forceSyncAll()
-    }
-
-    Cache.cleanup(this)
-    updateSyncJob()
-  }
-
-  private fun listenApplications() {
-    registerReceiver(object: BroadcastReceiver() {
-      override fun onReceive(context: Context, intent: Intent) {
-        val packageName = intent.data?.let { if (it.scheme == "package") it.schemeSpecificPart else null }
-        if (packageName != null) {
-          when (intent.action.orEmpty()) {
-            Intent.ACTION_PACKAGE_ADDED -> {
-              val installedItem = packageManager.getPackageInfo(packageName,
-                Android.PackageManager.signaturesFlag)?.toInstalledItem()
-              installedItem?.let(Database.InstalledAdapter::put)
-            }
-            Intent.ACTION_PACKAGE_REMOVED -> {
-              Database.InstalledAdapter.delete(packageName)
-            }
-          }
-        }
-      }
-    }, IntentFilter().apply {
-      addAction(Intent.ACTION_PACKAGE_ADDED)
-      addAction(Intent.ACTION_PACKAGE_REMOVED)
-      addDataScheme("package")
-    })
-    val installedItems = packageManager.getInstalledPackages(Android.PackageManager.signaturesFlag)
-      .mapNotNull { it.toInstalledItem() }
-    Database.InstalledAdapter.putAll(installedItems)
   }
 
   private fun updateSyncJob() {
diff --git a/src/main/kotlin/nya/kitsunyan/foxydroid/database/Database.kt b/src/main/kotlin/nya/kitsunyan/foxydroid/database/Database.kt
index 5ee374b..f2017db 100644
--- a/src/main/kotlin/nya/kitsunyan/foxydroid/database/Database.kt
+++ b/src/main/kotlin/nya/kitsunyan/foxydroid/database/Database.kt
@@ -1,6 +1,5 @@
 package nya.kitsunyan.foxydroid.database
 
-import android.annotation.SuppressLint
 import android.content.ContentValues
 import android.content.Context
 import android.database.Cursor
@@ -386,7 +385,6 @@ object Database {
         .use { it.firstOrNull()?.getInt(0) ?: 0 }
     }
 
-    @SuppressLint("Recycle")
     fun query(installed: Boolean, updates: Boolean, searchQuery: String,
       category: String, signal: CancellationSignal?): Cursor {
       val builder = QueryBuilder()
@@ -507,8 +505,10 @@ object Database {
     }
 
     fun delete(packageName: String) {
-      db.delete(Schema.Installed.name, "${Schema.Installed.ROW_PACKAGE_NAME} = ?", arrayOf(packageName))
-      notifyChanged(Subject.Products)
+      val count = db.delete(Schema.Installed.name, "${Schema.Installed.ROW_PACKAGE_NAME} = ?", arrayOf(packageName))
+      if (count > 0) {
+        notifyChanged(Subject.Products)
+      }
     }
 
     private fun transform(cursor: Cursor): InstalledItem {
diff --git a/src/main/kotlin/nya/kitsunyan/foxydroid/screen/ProductFragment.kt b/src/main/kotlin/nya/kitsunyan/foxydroid/screen/ProductFragment.kt
index 7e1efd5..dca2774 100644
--- a/src/main/kotlin/nya/kitsunyan/foxydroid/screen/ProductFragment.kt
+++ b/src/main/kotlin/nya/kitsunyan/foxydroid/screen/ProductFragment.kt
@@ -261,7 +261,7 @@ class ProductFragment(): Fragment(), ProductAdapter.Callbacks {
     if (recyclerView != null) {
       (recyclerView.adapter as ProductAdapter).setStatus(recyclerView, status)
     }
-    if (state is DownloadService.State.Success) {
+    if (state is DownloadService.State.Success && isResumed) {
       state.consume()
       screenActivity.startPackageInstaller(state.release.cacheFileName)
     }