I have the latest Xamarin studio other updates from stable but trying to update the PCL part of my code I get:
Updating Xamarin.Forms...
WARNING: Xamarin.Forms Package contains PowerShell scripts which will not be run.
Installing 'Xamarin.Forms 2.0.0.6484'.
Added file 'ICSharpCode.Decompiler.dll' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'ICSharpCode.NRefactory.Cecil.dll' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'ICSharpCode.NRefactory.CSharp.dll' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'ICSharpCode.NRefactory.dll' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'ICSharpCode.NRefactory.Xml.dll' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Mono.Cecil.dll' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Mono.Cecil.Mdb.dll' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Mono.Cecil.Pdb.dll' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Mono.Cecil.Rocks.dll' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Xamarin.Forms.Build.Tasks.dll' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Xamarin.Forms.Core.dll' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Xamarin.Forms.targets' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Xamarin.Forms.Xaml.dll' to folder 'Xamarin.Forms.2.0.0.6484\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'FormsViewGroup.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoAndroid10'.
Added file 'Xamarin.Forms.Core.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoAndroid10'.
Added file 'Xamarin.Forms.Core.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoAndroid10'.
Added file 'Xamarin.Forms.Platform.Android.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoAndroid10'.
Added file 'Xamarin.Forms.Platform.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoAndroid10'.
Added file 'Xamarin.Forms.Xaml.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoAndroid10'.
Added file 'Xamarin.Forms.Xaml.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoAndroid10'.
Added file 'Xamarin.Forms.Core.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoTouch10'.
Added file 'Xamarin.Forms.Core.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoTouch10'.
Added file 'Xamarin.Forms.Platform.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoTouch10'.
Added file 'Xamarin.Forms.Platform.iOS.Classic.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoTouch10'.
Added file 'Xamarin.Forms.Xaml.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoTouch10'.
Added file 'Xamarin.Forms.Xaml.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\MonoTouch10'.
Added file 'Xamarin.Forms.Core.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Xamarin.Forms.Core.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Xamarin.Forms.Platform.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Xamarin.Forms.Xaml.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Xamarin.Forms.Xaml.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10'.
Added file 'Xamarin.Forms.Core.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\uap10.0'.
Added file 'Xamarin.Forms.Core.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\uap10.0'.
Added file 'Xamarin.Forms.Platform.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\uap10.0'.
Added file 'Xamarin.Forms.Platform.UAP.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\uap10.0'.
Added file 'Xamarin.Forms.Platform.UAP.pri' to folder 'Xamarin.Forms.2.0.0.6484\lib\uap10.0'.
Added file 'FormsTextBox.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\uap10.0\Xamarin.Forms.Platform.UAP'.
Added file 'PageControl.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\uap10.0\Xamarin.Forms.Platform.UAP'.
Added file 'Xamarin.Forms.Platform.UAP.rd.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\uap10.0\Xamarin.Forms.Platform.UAP\Properties'.
Added file 'Resources.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\uap10.0\Xamarin.Forms.Platform.UAP'.
Added file 'Xamarin.Forms.Platform.UAP.xr.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\uap10.0\Xamarin.Forms.Platform.UAP'.
Added file 'Xamarin.Forms.Xaml.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\uap10.0'.
Added file 'Xamarin.Forms.Xaml.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\uap10.0'.
Added file 'Xamarin.Forms.Core.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81'.
Added file 'Xamarin.Forms.Core.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81'.
Added file 'Xamarin.Forms.Platform.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81'.
Added file 'Xamarin.Forms.Platform.WinRT.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81'.
Added file 'Xamarin.Forms.Platform.WinRT.pri' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81'.
Added file 'Xamarin.Forms.Platform.WinRT.Tablet.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81'.
Added file 'Xamarin.Forms.Platform.WinRT.Tablet.pri' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81'.
Added file 'Resources.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81\Xamarin.Forms.Platform.WinRT.Tablet'.
Added file 'TabletResources.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81\Xamarin.Forms.Platform.WinRT.Tablet'.
Added file 'Xamarin.Forms.Platform.WinRT.Tablet.xr.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81\Xamarin.Forms.Platform.WinRT.Tablet'.
Added file 'FormsTextBox.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81\Xamarin.Forms.Platform.WinRT'.
Added file 'PageControl.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81\Xamarin.Forms.Platform.WinRT'.
Added file 'StepperControl.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81\Xamarin.Forms.Platform.WinRT'.
Added file 'Xamarin.Forms.Platform.WinRT.xr.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81\Xamarin.Forms.Platform.WinRT'.
Added file 'Xamarin.Forms.Xaml.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81'.
Added file 'Xamarin.Forms.Xaml.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\win81'.
Added file 'Xamarin.Forms.Core.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\WP80'.
Added file 'Xamarin.Forms.Core.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\WP80'.
Added file 'Xamarin.Forms.Platform.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\WP80'.
Added file 'Xamarin.Forms.Platform.WP8.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\WP80'.
Added file 'Xamarin.Forms.Xaml.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\WP80'.
Added file 'Xamarin.Forms.Xaml.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\WP80'.
Added file 'Xamarin.Forms.Core.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81'.
Added file 'Xamarin.Forms.Core.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81'.
Added file 'Xamarin.Forms.Platform.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81'.
Added file 'Xamarin.Forms.Platform.WinRT.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81'.
Added file 'Xamarin.Forms.Platform.WinRT.Phone.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81'.
Added file 'Xamarin.Forms.Platform.WinRT.Phone.pri' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81'.
Added file 'PhoneResources.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81\Xamarin.Forms.Platform.WinRT.Phone'.
Added file 'Resources.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81\Xamarin.Forms.Platform.WinRT.Phone'.
Added file 'SearchBox.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81\Xamarin.Forms.Platform.WinRT.Phone'.
Added file 'Xamarin.Forms.Platform.WinRT.Phone.xr.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81\Xamarin.Forms.Platform.WinRT.Phone'.
Added file 'Xamarin.Forms.Platform.WinRT.pri' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81'.
Added file 'FormsTextBox.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81\Xamarin.Forms.Platform.WinRT'.
Added file 'PageControl.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81\Xamarin.Forms.Platform.WinRT'.
Added file 'StepperControl.xbf' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81\Xamarin.Forms.Platform.WinRT'.
Added file 'Xamarin.Forms.Platform.WinRT.xr.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81\Xamarin.Forms.Platform.WinRT'.
Added file 'Xamarin.Forms.Xaml.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81'.
Added file 'Xamarin.Forms.Xaml.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\wpa81'.
Added file 'Xamarin.Forms.Core.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\Xamarin.iOS10'.
Added file 'Xamarin.Forms.Core.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\Xamarin.iOS10'.
Added file 'Xamarin.Forms.Platform.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\Xamarin.iOS10'.
Added file 'Xamarin.Forms.Platform.iOS.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\Xamarin.iOS10'.
Added file 'Xamarin.Forms.Xaml.dll' to folder 'Xamarin.Forms.2.0.0.6484\lib\Xamarin.iOS10'.
Added file 'Xamarin.Forms.Xaml.xml' to folder 'Xamarin.Forms.2.0.0.6484\lib\Xamarin.iOS10'.
Added file 'init.ps1' to folder 'Xamarin.Forms.2.0.0.6484\tools'.
Added file 'Xamarin.Forms.Core.Design.dll' to folder 'Xamarin.Forms.2.0.0.6484\tools'.
Added file 'Xamarin.Forms.Xaml.Design.dll' to folder 'Xamarin.Forms.2.0.0.6484\tools'.
Added file 'Xamarin.Forms.2.0.0.6484.nupkg' to folder 'Xamarin.Forms.2.0.0.6484'.
Successfully installed 'Xamarin.Forms 2.0.0.6484'.
Looking for updates for 'Xamarin.Forms'...
Updating 'Xamarin.Forms' from version '1.4.2.6359' to '2.0.0.6484' in project 'ersV4'.
Removing 'Xamarin.Forms 1.4.2.6359' from ersV4.
Removed reference 'Xamarin.Forms.Core' from project 'ersV4'.
Removed reference 'Xamarin.Forms.Platform' from project 'ersV4'.
Removed reference 'Xamarin.Forms.Xaml' from project 'ersV4'.
Added file 'packages.config'.
Added file 'packages.config' to project 'ersV4'.
Successfully removed 'Xamarin.Forms 1.4.2.6359' from ersV4.
Adding 'Xamarin.Forms 2.0.0.6484' to ersV4.
Could not install package 'Xamarin.Forms 2.0.0.6484'. You are trying to install this package into a project that targets 'portable-net45+dnxcore50+win+wp80+MonoAndroid10+xamarinios10+MonoTouch10', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.