diff --git a/src/AndroidFileChooserBinding/AndroidFileChooserBinding.csproj b/src/AndroidFileChooserBinding/AndroidFileChooserBinding.csproj
index a841a519..3fe01d37 100644
--- a/src/AndroidFileChooserBinding/AndroidFileChooserBinding.csproj
+++ b/src/AndroidFileChooserBinding/AndroidFileChooserBinding.csproj
@@ -10,7 +10,7 @@
     <RootNamespace>AndroidFileChooserBinding</RootNamespace>
     <AssemblyName>AndroidFileChooserBinding</AssemblyName>
     <FileAlignment>512</FileAlignment>
-    <TargetFrameworkVersion>v7.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v6.0</TargetFrameworkVersion>
     <AndroidUseLatestPlatformSdk>True</AndroidUseLatestPlatformSdk>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/src/JavaFileStorageBindings/JavaFileStorageBindings.csproj b/src/JavaFileStorageBindings/JavaFileStorageBindings.csproj
index 9123ffe9..65d58114 100644
--- a/src/JavaFileStorageBindings/JavaFileStorageBindings.csproj
+++ b/src/JavaFileStorageBindings/JavaFileStorageBindings.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>JavaFileStorageBindings</AssemblyName>
     <FileAlignment>512</FileAlignment>
     <AndroidUseLatestPlatformSdk>True</AndroidUseLatestPlatformSdk>
-    <TargetFrameworkVersion>v7.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v6.0</TargetFrameworkVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/src/KP2AKdbLibraryBinding/KP2AKdbLibraryBinding.csproj b/src/KP2AKdbLibraryBinding/KP2AKdbLibraryBinding.csproj
index 77429eaa..a0ed90dd 100644
--- a/src/KP2AKdbLibraryBinding/KP2AKdbLibraryBinding.csproj
+++ b/src/KP2AKdbLibraryBinding/KP2AKdbLibraryBinding.csproj
@@ -10,7 +10,7 @@
     <RootNamespace>KP2AKdbLibraryBinding</RootNamespace>
     <AssemblyName>KP2AKdbLibraryBinding</AssemblyName>
     <FileAlignment>512</FileAlignment>
-    <TargetFrameworkVersion>v7.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v6.0</TargetFrameworkVersion>
     <AndroidUseLatestPlatformSdk>True</AndroidUseLatestPlatformSdk>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/src/KeePassLib2Android/KeePassLib2Android.csproj b/src/KeePassLib2Android/KeePassLib2Android.csproj
index c10e7427..abda7528 100644
--- a/src/KeePassLib2Android/KeePassLib2Android.csproj
+++ b/src/KeePassLib2Android/KeePassLib2Android.csproj
@@ -12,7 +12,7 @@
     <AndroidResgenFile>Resources\Resource.designer.cs</AndroidResgenFile>
     <AndroidResgenClass>Resource</AndroidResgenClass>
     <AssemblyName>KeePassLib2Android</AssemblyName>
-    <TargetFrameworkVersion>v7.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v6.0</TargetFrameworkVersion>
     <AndroidUseLatestPlatformSdk>True</AndroidUseLatestPlatformSdk>
     <NuGetPackageImportStamp>8482b288</NuGetPackageImportStamp>
   </PropertyGroup>
diff --git a/src/Kp2aBusinessLogic/Kp2aBusinessLogic.csproj b/src/Kp2aBusinessLogic/Kp2aBusinessLogic.csproj
index b51f04ce..50b23c77 100644
--- a/src/Kp2aBusinessLogic/Kp2aBusinessLogic.csproj
+++ b/src/Kp2aBusinessLogic/Kp2aBusinessLogic.csproj
@@ -12,7 +12,7 @@
     <FileAlignment>512</FileAlignment>
     <AndroidResgenFile>Resources\Resource.Designer.cs</AndroidResgenFile>
     <GenerateSerializationAssemblies>Off</GenerateSerializationAssemblies>
-    <TargetFrameworkVersion>v7.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v6.0</TargetFrameworkVersion>
     <AndroidUseLatestPlatformSdk>true</AndroidUseLatestPlatformSdk>
     <NuGetPackageImportStamp>06ffb71c</NuGetPackageImportStamp>
   </PropertyGroup>
diff --git a/src/Kp2aKeyboardBinding/Kp2aKeyboardBinding.csproj b/src/Kp2aKeyboardBinding/Kp2aKeyboardBinding.csproj
index e21cd150..8d8c5fae 100644
--- a/src/Kp2aKeyboardBinding/Kp2aKeyboardBinding.csproj
+++ b/src/Kp2aKeyboardBinding/Kp2aKeyboardBinding.csproj
@@ -11,7 +11,7 @@
     <MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
     <AssemblyName>Kp2aKeyboardBinding</AssemblyName>
     <AndroidUseLatestPlatformSdk>True</AndroidUseLatestPlatformSdk>
-    <TargetFrameworkVersion>v7.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v6.0</TargetFrameworkVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>True</DebugSymbols>
diff --git a/src/PluginSdkBinding/PluginSdkBinding.csproj b/src/PluginSdkBinding/PluginSdkBinding.csproj
index d32a1b32..1dc53f91 100644
--- a/src/PluginSdkBinding/PluginSdkBinding.csproj
+++ b/src/PluginSdkBinding/PluginSdkBinding.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>PluginSdkBinding</AssemblyName>
     <FileAlignment>512</FileAlignment>
     <AndroidUseLatestPlatformSdk>True</AndroidUseLatestPlatformSdk>
-    <TargetFrameworkVersion>v7.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v6.0</TargetFrameworkVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/src/SamsungPass b/src/SamsungPass
index 79184ec7..95bc88e1 160000
--- a/src/SamsungPass
+++ b/src/SamsungPass
@@ -1 +1 @@
-Subproject commit 79184ec7cd77d89602e8ea4d5f38f7e2631aceb1
+Subproject commit 95bc88e1826f64ccb9fb7e68d7f77edb12ac73ef
diff --git a/src/TwofishCipher/TwofishCipher.csproj b/src/TwofishCipher/TwofishCipher.csproj
index 35a72b44..48337a23 100644
--- a/src/TwofishCipher/TwofishCipher.csproj
+++ b/src/TwofishCipher/TwofishCipher.csproj
@@ -13,7 +13,7 @@
     <AndroidResgenFile>Resources\Resource.Designer.cs</AndroidResgenFile>
     <GenerateSerializationAssemblies>Off</GenerateSerializationAssemblies>
     <AndroidUseLatestPlatformSdk>True</AndroidUseLatestPlatformSdk>
-    <TargetFrameworkVersion>v7.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v6.0</TargetFrameworkVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/src/ZlibAndroid/ZlibAndroid.csproj b/src/ZlibAndroid/ZlibAndroid.csproj
index 295d16ac..d2238c67 100644
--- a/src/ZlibAndroid/ZlibAndroid.csproj
+++ b/src/ZlibAndroid/ZlibAndroid.csproj
@@ -13,7 +13,7 @@
     <MonoAndroidAssetsPrefix>Assets</MonoAndroidAssetsPrefix>
     <AndroidUseLatestPlatformSdk>True</AndroidUseLatestPlatformSdk>
     <AssemblyName>ZlibAndroid</AssemblyName>
-    <TargetFrameworkVersion>v7.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v6.0</TargetFrameworkVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/src/keepass2android/keepass2android.csproj b/src/keepass2android/keepass2android.csproj
index 11e2b9ee..c9228c12 100644
--- a/src/keepass2android/keepass2android.csproj
+++ b/src/keepass2android/keepass2android.csproj
@@ -15,7 +15,7 @@
     <AssemblyName>keepass2android</AssemblyName>
     <newfilesearch>OnLoad</newfilesearch>
     <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
-    <TargetFrameworkVersion>v7.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v6.0</TargetFrameworkVersion>
     <MandroidI18n />
     <JavaMaximumHeapSize>1G</JavaMaximumHeapSize>
     <AndroidUseLatestPlatformSdk>true</AndroidUseLatestPlatformSdk>
@@ -43,7 +43,7 @@
     <AndroidLinkMode>SdkOnly</AndroidLinkMode>
     <BundleAssemblies>False</BundleAssemblies>
     <AndroidCreatePackagePerAbi>False</AndroidCreatePackagePerAbi>
-    <AndroidEnableMultiDex>False</AndroidEnableMultiDex>
+    <AndroidEnableMultiDex>false</AndroidEnableMultiDex>
     <EnableProguard>true</EnableProguard>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
diff --git a/src/netftpandroid b/src/netftpandroid
index 561a509f..62733d71 160000
--- a/src/netftpandroid
+++ b/src/netftpandroid
@@ -1 +1 @@
-Subproject commit 561a509f390aef519cefd0c964af4f089ead211a
+Subproject commit 62733d714fec6a2806daced432230998eabca29f