vCAC 6.0.1 to 6.1: Upgrade issue with IaaS installer

I've successfully upgraded the ID server, the VCAC server and the IAAS DB but can't launch (Run as Administrator) IaaS installer

All IaaS components (DEM, DEO, Model Manager...) are on a single (W2K8 R2)  with jre 1.8 64 bits and .NET 4.5.1.

Problem come from .NET :

Application: setup__vcac6.xxxxx.xx@5480.exe

Framework Version: v4.0.30319

Description: The process was terminated due to an unhandled exception.

Exception Info: System.Reflection.TargetInvocationException

Stack:

   at System.RuntimeType.CreateInstanceImpl(System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[], System.Globalization.CultureInfo, System.Object[], System.Threading.StackCrawlMark ByRef)

   at System.Activator.CreateInstance(System.Type, System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[], System.Globalization.CultureInfo, System.Object[])

   at System.Activator.CreateInstance(System.Type, System.Object[])

   at DynamicOps.Setup.MasterInstaller.HelperClass.InstalledComponentsFromRegistry(System.String)

   at DynamicOps.Setup.MasterInstaller.HelperClass.InstalledComponentList()

   at VcacSuiteInstaller.VcacSuiteConfigMainForm..ctor()

   at VcacSuiteInstaller.VcacSuiteMainApplication.Main()

Does anybody can help me out?

Regards