diff --git a/app/build.gradle b/app/build.gradle
index 710aec8f..7ee81956 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -151,7 +151,7 @@ dependencies {
     implementation "com.jaredrummler:colorpicker:1.0.2"
     implementation("com.squareup.okhttp3:okhttp") {
         version {
-            strictly "3.12.2"
+            strictly "3.12.13"
         }
     }
     implementation "com.theartofdev.edmodo:android-image-cropper:2.8.0" // do not update
diff --git a/app/proguard/app.pro b/app/proguard/app.pro
index b96a904c..8b3e3e2b 100644
--- a/app/proguard/app.pro
+++ b/app/proguard/app.pro
@@ -66,4 +66,4 @@
 
 -keepclassmembers class pl.szczodrzynski.edziennik.data.api.szkolny.request.** { *; }
 -keepclassmembers class pl.szczodrzynski.edziennik.data.api.szkolny.response.** { *; }
--keepclassmembernames class pl.szczodrzynski.edziennik.ui.modules.login.LoginInfo.Platform { *; }
+-keepclassmembernames class pl.szczodrzynski.edziennik.ui.modules.login.LoginInfo$Platform { *; }
diff --git a/app/src/main/assets/pl-changelog.html b/app/src/main/assets/pl-changelog.html
index 165582ec..f22c959b 100644
--- a/app/src/main/assets/pl-changelog.html
+++ b/app/src/main/assets/pl-changelog.html
@@ -1,6 +1,7 @@
-<h3>Wersja 4.5-beta.2, 2021-02-21</h3>
+<h3>Wersja 4.5, 2021-02-21</h3>
 <ul>
     <li>Vulcan: aplikacja Szkolny.eu zaktualizowana w związku z wygaszeniem aplikacji Dzienniczek+.</li>
+    <li><b>Mogą pojawić się brakujące funkcje, np. wysyłanie wiadomości - zostaną one wprowadzone w najbliższych dniach.</b></li>
 </ul>
 <br>
 <br>
diff --git a/app/src/main/cpp/szkolny-signing.cpp b/app/src/main/cpp/szkolny-signing.cpp
index b2b15406..0176acf6 100644
--- a/app/src/main/cpp/szkolny-signing.cpp
+++ b/app/src/main/cpp/szkolny-signing.cpp
@@ -9,7 +9,7 @@
 
 /*secret password - removed for source code publication*/
 static toys AES_IV[16] = {
-	0x42, 0xf5, 0x8e, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  };
+	0x4f, 0x43, 0x04, 0x06, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  };
 
 unsigned char *agony(unsigned int laugh, unsigned char *box, unsigned char *heat);
 
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/config/Config.kt b/app/src/main/java/pl/szczodrzynski/edziennik/config/Config.kt
index 98240be5..5cdf30bc 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/config/Config.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/config/Config.kt
@@ -105,6 +105,11 @@ class Config(val db: AppDb) : CoroutineScope, AbstractConfig {
         get() { mWidgetConfigs = mWidgetConfigs ?: values.get("widgetConfigs", JsonObject()); return mWidgetConfigs ?: JsonObject() }
         set(value) { set("widgetConfigs", value); mWidgetConfigs = value }
 
+    private var mArchiverEnabled: Boolean? = null
+    var archiverEnabled: Boolean
+        get() { mArchiverEnabled = mArchiverEnabled ?: values.get("archiverEnabled", true); return mArchiverEnabled ?: true }
+        set(value) { set("archiverEnabled", value); mArchiverEnabled = value }
+
     private var rawEntries: List<ConfigEntry> = db.configDao().getAllNow()
     private val profileConfigs: HashMap<Int, ProfileConfig> = hashMapOf()
     init {
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/interceptor/Signing.kt b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/interceptor/Signing.kt
index b15b6408..c6d7ac07 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/interceptor/Signing.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/interceptor/Signing.kt
@@ -46,6 +46,6 @@ object Signing {
 
     /*fun provideKey(param1: String, param2: Long): ByteArray {*/
     fun pleaseStopRightNow(param1: String, param2: Long): ByteArray {
-        return "$param1.MTIzNDU2Nzg5MDL9U0lwJn===.$param2".sha256()
+        return "$param1.MTIzNDU2Nzg5MD5LwH9bSc===.$param2".sha256()
     }
 }
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Profile.kt b/app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Profile.kt
index 997e845b..9e52dc81 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Profile.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Profile.kt
@@ -103,7 +103,9 @@ open class Profile(
             dateSemester2Start.year -= diff
             dateYearEnd.year -= diff
         }
-        return Date.getToday() >= dateYearEnd && Date.getToday().year > studentSchoolYearStart
+        return App.config.archiverEnabled
+                && Date.getToday() >= dateYearEnd
+                && Date.getToday().year > studentSchoolYearStart
     }
     fun isBeforeYear() = false && Date.getToday() < dateSemester1Start
 
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/debug/LabPageFragment.kt b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/debug/LabPageFragment.kt
index 72b9f9f5..c6fbcbc6 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/debug/LabPageFragment.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/debug/LabPageFragment.kt
@@ -45,6 +45,8 @@ class LabPageFragment : LazyFragment(), CoroutineScope {
     }
 
     override fun onPageCreated(): Boolean {
+        b.app = app
+
         b.last10unseen.onClick {
             launch(Dispatchers.Default) {
                 val events = app.db.eventDao().getAllNow(App.profileId)
diff --git a/app/src/main/res/layout/lab_fragment.xml b/app/src/main/res/layout/lab_fragment.xml
index b023e11c..356c11c0 100644
--- a/app/src/main/res/layout/lab_fragment.xml
+++ b/app/src/main/res/layout/lab_fragment.xml
@@ -7,6 +7,10 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     tools:ignore="HardcodedText">
 
+    <data>
+        <variable name="app" type="pl.szczodrzynski.edziennik.App"/>
+    </data>
+
     <ScrollView
         android:layout_width="match_parent"
         android:layout_height="match_parent">
@@ -74,6 +78,12 @@
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox" />
+
+            <com.google.android.material.checkbox.MaterialCheckBox
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:checked="@={app.config.archiverEnabled}"
+                android:text="Archiver enabled" />
         </LinearLayout>
     </ScrollView>
 </layout>
diff --git a/build.gradle b/build.gradle
index 54a6a31b..c1279034 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,8 +5,8 @@ buildscript {
         kotlin_version = '1.4.30'
 
         release = [
-                versionName: "4.5-beta.2",
-                versionCode: 4050002
+                versionName: "4.5",
+                versionCode: 4050099
         ]
 
         setup = [