diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/App.java b/app/src/main/java/pl/szczodrzynski/edziennik/App.java
index 09926597..37b11cc5 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/App.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/App.java
@@ -514,7 +514,7 @@ public class App extends androidx.multidex.MultiDexApplication {
             }
         }
 
-        if (appConfig.lastAppVersion > BuildConfig.VERSION_CODE) {
+        /*if (appConfig.lastAppVersion > BuildConfig.VERSION_CODE) {
             BootReceiver br = new BootReceiver();
             Intent i = new Intent();
             //i.putExtra("UserChecked", true);
@@ -522,7 +522,7 @@ public class App extends androidx.multidex.MultiDexApplication {
             Toast.makeText(mContext, R.string.warning_older_version_running, Toast.LENGTH_LONG).show();
             //Toast.makeText(mContext, "Zaktualizuj aplikację.", Toast.LENGTH_LONG).show();
             //System.exit(0);
-        }
+        }*/
 
         if (appConfig == null) {
             appConfig = new AppConfig(this);
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/Extensions.kt b/app/src/main/java/pl/szczodrzynski/edziennik/Extensions.kt
index c6d05ce8..2dff656b 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/Extensions.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/Extensions.kt
@@ -6,21 +6,14 @@ import android.content.Context
 import android.content.pm.PackageManager
 import android.os.Build
 import android.os.Bundle
-import android.util.Log
 import androidx.core.app.ActivityCompat
 import com.google.gson.JsonArray
-import com.google.gson.JsonNull
 import com.google.gson.JsonObject
-import im.wangchao.mhttp.Response
-import im.wangchao.mhttp.callback.JsonCallbackHandler
-import im.wangchao.mhttp.callback.TextCallbackHandler
-import im.wangchao.mhttp.internal.exception.ResponseFailException
 import pl.szczodrzynski.edziennik.datamodels.Profile
 import pl.szczodrzynski.edziennik.datamodels.Teacher
-import pl.szczodrzynski.navlib.R
 import pl.szczodrzynski.navlib.crc16
 import pl.szczodrzynski.navlib.getColorFromRes
-import kotlin.contracts.contract
+
 
 fun List<Teacher>.byId(id: Long) = firstOrNull { it.id == id }
 fun List<Teacher>.byNameFirstLast(nameFirstLast: String) = firstOrNull { it.name + " " + it.surname == nameFirstLast }
@@ -28,11 +21,19 @@ fun List<Teacher>.byNameLastFirst(nameLastFirst: String) = firstOrNull { it.surn
 fun List<Teacher>.byNameFDotLast(nameFDotLast: String) = firstOrNull { it.name + "." + it.surname == nameFDotLast }
 fun List<Teacher>.byNameFDotSpaceLast(nameFDotSpaceLast: String) = firstOrNull { it.name + ". " + it.surname == nameFDotSpaceLast }
 
-fun JsonObject.getString(key: String): String? = get(key).let { if (it.isJsonNull) null else it.asString }
-fun JsonObject.getInt(key: String): Int? = get(key).let { if (it.isJsonNull) null else it.asInt }
-fun JsonObject.getLong(key: String): Long? = get(key).let { if (it.isJsonNull) null else it.asLong }
-fun JsonObject.getJsonObject(key: String): JsonObject? = get(key).let { if (it.isJsonNull) null else it.asJsonObject }
-fun JsonObject.getJsonArray(key: String): JsonArray? = get(key).let { if (it.isJsonNull) null else it.asJsonArray }
+fun JsonObject.getBoolean(key: String): Boolean? = get(key)?.let { if (it.isJsonNull) null else it.asBoolean }
+fun JsonObject.getString(key: String): String? = get(key)?.let { if (it.isJsonNull) null else it.asString }
+fun JsonObject.getInt(key: String): Int? = get(key)?.let { if (it.isJsonNull) null else it.asInt }
+fun JsonObject.getLong(key: String): Long? = get(key)?.let { if (it.isJsonNull) null else it.asLong }
+fun JsonObject.getJsonObject(key: String): JsonObject? = get(key)?.let { if (it.isJsonNull) null else it.asJsonObject }
+fun JsonObject.getJsonArray(key: String): JsonArray? = get(key)?.let { if (it.isJsonNull) null else it.asJsonArray }
+
+fun JsonObject.getBoolean(key: String, defaultValue: Boolean): Boolean = get(key)?.let { if (it.isJsonNull) defaultValue else it.asBoolean } ?: defaultValue
+fun JsonObject.getString(key: String, defaultValue: String): String = get(key)?.let { if (it.isJsonNull) defaultValue else it.asString } ?: defaultValue
+fun JsonObject.getInt(key: String, defaultValue: Int): Int = get(key)?.let { if (it.isJsonNull) defaultValue else it.asInt } ?: defaultValue
+fun JsonObject.getLong(key: String, defaultValue: Long): Long = get(key)?.let { if (it.isJsonNull) defaultValue else it.asLong } ?: defaultValue
+fun JsonObject.getJsonObject(key: String, defaultValue: JsonObject): JsonObject = get(key)?.let { if (it.isJsonNull) defaultValue else it.asJsonObject } ?: defaultValue
+fun JsonObject.getJsonArray(key: String, defaultValue: JsonArray): JsonArray = get(key)?.let { if (it.isJsonNull) defaultValue else it.asJsonArray } ?: defaultValue
 
 fun CharSequence?.isNotNullNorEmpty(): Boolean {
     return this != null && this.isNotEmpty()
@@ -53,6 +54,26 @@ fun Bundle?.getString(key: String, defaultValue: String): String {
     return this?.getString(key, defaultValue) ?: defaultValue
 }
 
+fun changeStringCase(s: String): String {
+    val delimiters = " '-/"
+    val sb = StringBuilder()
+    var capNext = true
+    for (ch in s.toCharArray()) {
+        var c = ch
+        c = if (capNext)
+            Character.toUpperCase(c)
+        else
+            Character.toLowerCase(c)
+        sb.append(c)
+        capNext = delimiters.indexOf(c) >= 0
+    }
+    return sb.toString()
+}
+
+fun buildFullName(firstName: String?, lastName: String?): String {
+    return changeStringCase("$firstName $lastName").trim()
+}
+
 fun colorFromName(context: Context, name: String?): Int {
     var crc = crc16(name ?: "")
     crc = (crc and 0xff) or (crc shr 8)
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/datamodels/Profile.kt b/app/src/main/java/pl/szczodrzynski/edziennik/datamodels/Profile.kt
index 1404e8bf..8fa92771 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/datamodels/Profile.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/datamodels/Profile.kt
@@ -47,11 +47,26 @@ open class Profile : IDrawerProfile {
     var empty = true
     var archived = false
 
+    /**
+     * The name of the student.
+     * This doesn't change, no matter if it's a parent or student account.
+     */
     var studentNameLong: String? = null
     var studentNameShort: String? = null
+    /**
+     * The student's number in the class register.
+     */
     var studentNumber = -1
     var studentData: JsonObject? = null
 
+    /**
+     * A full name of the account owner.
+     * If null, then it's a student account.
+     * If not null, then it's a parent account with this name.
+     */
+    @Ignore
+    var accountNameLong: String? = null
+
     var registration = REGISTRATION_UNSPECIFIED
 
     var gradeColorMode = COLOR_MODE_WEIGHTED
@@ -61,7 +76,7 @@ open class Profile : IDrawerProfile {
 
     var currentSemester = 1
 
-    var attendancePercentage: Float = 0.toFloat()
+    var attendancePercentage: Float = 0.0f
 
     var dateSemester1Start: Date? = null
     var dateSemester2Start: Date? = null
@@ -192,6 +207,12 @@ open class Profile : IDrawerProfile {
         getImageHolder(imageView.context).applyTo(imageView)
     }
 
+    fun hasStudentData(key: String): Boolean {
+        if (studentData == null)
+            return false
+        return studentData?.has(key) ?: false
+    }
+
     fun getStudentData(key: String, defaultValue: String?): String? {
         if (studentData == null)
             return defaultValue
@@ -229,7 +250,7 @@ open class Profile : IDrawerProfile {
         return element?.asBoolean ?: defaultValue
     }
 
-    fun putStudentData(key: String, value: String) {
+    fun putStudentData(key: String, value: String?) {
         if (studentData == null)
             studentData = JsonObject()
         studentData!!.addProperty(key, value)