diff --git a/app/build.gradle b/app/build.gradle
index 994b4f9..4bbfbc5 100755
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -5,20 +5,16 @@ static def gitSha() {
 }
 
 def versionRewrite = 2
-def versionRelease = 3
+def versionRelease = 5
 
 android {
     signingConfigs {
         release {
         }
     }
-    signingConfigs {
-        release {
-        }
-    }
-    def signingPropFile = new File(System.properties['user.home'], ".signing/wakelock/signing.properties")
+    def signingPropFile = new File(System.properties['user.home'], ".appconfig/eu.thedarken.wl/signing.properties")
     if (signingPropFile.canRead()) {
-        def Properties signingProps = new Properties()
+        Properties signingProps = new Properties()
         signingProps.load(new FileInputStream(signingPropFile))
         signingConfigs {
             release {
@@ -31,7 +27,7 @@ android {
     }
 
     compileSdkVersion 7
-    buildToolsVersion "25.0.2"
+    buildToolsVersion "25.0.3"
 
     defaultConfig {
         minSdkVersion 7
diff --git a/app/src/main/java/eu/thedarken/wl/dialogs/About.java b/app/src/main/java/eu/thedarken/wl/dialogs/About.java
index f3c12dc..2c3ecb4 100755
--- a/app/src/main/java/eu/thedarken/wl/dialogs/About.java
+++ b/app/src/main/java/eu/thedarken/wl/dialogs/About.java
@@ -5,11 +5,11 @@
 import android.content.Intent;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.net.Uri;
+import android.os.Build;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;
 
-import eu.thedarken.wl.BuildConfig;
 import eu.thedarken.wl.R;
 
 public class About extends Dialog {
@@ -34,12 +34,13 @@ public About(Context context) {
         TextView about = (TextView) findViewById(R.id.about);
         about.setText(R.string.about_text);
 
-        Button donate = (Button) findViewById(R.id.donate);
-        donate.setVisibility(BuildConfig.FLAVOR.equals("free") ? View.VISIBLE : View.GONE);
-        donate.setOnClickListener(new android.view.View.OnClickListener() {
+        findViewById(R.id.upgrade_hint).setVisibility(Build.VERSION.SDK_INT >= 16 ? View.VISIBLE : View.GONE);
+        Button upgrade = (Button) findViewById(R.id.upgrade);
+        upgrade.setVisibility(Build.VERSION.SDK_INT >= 16 ? View.VISIBLE : View.GONE);
+        upgrade.setOnClickListener(new android.view.View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Intent marketIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=eu.thedarken.wldonate"));
+                Intent marketIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=eu.thedarken.wldonate"));
                 getContext().startActivity(marketIntent);
             }
         });
diff --git a/app/src/main/res/layout/dialog_about.xml b/app/src/main/res/layout/dialog_about.xml
index 79deb6f..a404219 100755
--- a/app/src/main/res/layout/dialog_about.xml
+++ b/app/src/main/res/layout/dialog_about.xml
@@ -27,13 +27,19 @@
         android:paddingBottom="8dp"
         android:text="@string/about"/>
 
+    <TextView
+        android:id="@+id/upgrade_hint"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:paddingBottom="8dp"
+        android:text="@string/upgrade_text"/>
 
     <LinearLayout
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:paddingTop="8dp"
-        android:orientation="horizontal">
+        android:orientation="horizontal"
+        android:paddingTop="8dp">
 
         <Button
             android:id="@+id/home"
@@ -43,10 +49,10 @@
             android:text="darken.eu"/>
 
         <Button
-            android:id="@+id/donate"
+            android:id="@+id/upgrade"
             android:layout_width="120dp"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
-            android:text="@string/action_donate"/>
+            android:text="@string/action_upgrade"/>
     </LinearLayout>
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index ad0acc6..fc8e9cd 100755
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -10,8 +10,10 @@
     <string name="option_call_desc">The lock will be acquired when the device starts ringing and is released when the call ends.</string>
     <string name="buy_donation_version">Buy donation version</string>
     <string name="locktype_none">None</string>
-    <string name="about_text"><![CDATA[This app allows you to acquire wakelocks from Androids PowerManager.\n\nIt is free of charge and without ads. If this app helped you, consider buying the \'Donate Version\' on Google Play.\n\nReach me under support@darken.eu]]></string>
+    <string name="about_text"><![CDATA[This app allows you to acquire wakelocks from Androids PowerManager.\n\nIt is free of charge and without ads.\nReach me under support@darken.eu]]></string>
+    <string name="upgrade_text">A modern version of this app is also available.</string>
     <string name="version_x">Version: %s</string>
     <string name="action_donate">Donate</string>
     <string name="privacy_policy">Privacy policy:\nThis app does not collect any data.</string>
+    <string name="action_upgrade">Upgrade</string>
 </resources>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index f6627fc..e52ed0a 100755
--- a/build.gradle
+++ b/build.gradle
@@ -1,10 +1,9 @@
-// Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
     repositories {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.2'
+        classpath 'com.android.tools.build:gradle:2.3.3'
     }
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 13372ae..dd6c805 100755
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 7d1b744..3779dd5 100755
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Sun May 14 17:29:29 CEST 2017
+#Sat Aug 25 14:49:29 CEST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
diff --git a/gradlew b/gradlew
index 9d82f78..4453cce 100755
--- a/gradlew
+++ b/gradlew
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 ##############################################################################
 ##
@@ -6,12 +6,30 @@
 ##
 ##############################################################################
 
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
 
 APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
 
@@ -30,6 +48,7 @@ die ( ) {
 cygwin=false
 msys=false
 darwin=false
+nonstop=false
 case "`uname`" in
   CYGWIN* )
     cygwin=true
@@ -40,26 +59,11 @@ case "`uname`" in
   MINGW* )
     msys=true
     ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
 esac
 
-# Attempt to set APP_HOME
-# Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
-done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
-
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
 # Determine the Java command to use to start the JVM.
@@ -85,7 +89,7 @@ location of your Java installation."
 fi
 
 # Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
     MAX_FD_LIMIT=`ulimit -H -n`
     if [ $? -eq 0 ] ; then
         if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
@@ -150,11 +154,19 @@ if $cygwin ; then
     esac
 fi
 
-# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
-function splitJvmOpts() {
-    JVM_OPTS=("$@")
+# Escape application args
+save ( ) {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
 }
-eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
-JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
 
-exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
index 8a0b282..f955316 100755
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -8,14 +8,14 @@
 @rem Set local scope for the variables with windows NT shell
 if "%OS%"=="Windows_NT" setlocal
 
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
-
 set DIRNAME=%~dp0
 if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
 
@@ -46,10 +46,9 @@ echo location of your Java installation.
 goto fail
 
 :init
-@rem Get command-line arguments, handling Windowz variants
+@rem Get command-line arguments, handling Windows variants
 
 if not "%OS%" == "Windows_NT" goto win9xME_args
-if "%@eval[2+2]" == "4" goto 4NT_args
 
 :win9xME_args
 @rem Slurp the command line arguments.
@@ -60,11 +59,6 @@ set _SKIP=2
 if "x%~1" == "x" goto execute
 
 set CMD_LINE_ARGS=%*
-goto execute
-
-:4NT_args
-@rem Get arguments from the 4NT Shell from JP Software
-set CMD_LINE_ARGS=%$
 
 :execute
 @rem Setup the command line