Ebp frame work

Bonjour, a tous et toute
depuis hier je peux pu ouvrir mon ebp ! devis et facturation
du coup je suis totalement bloqué ! et il se crash aussitot

C:\Program Files\EBP\Invoicing5.0FRFR10\EBP.Invoicing.Application.exe
System.InvalidOperationException : Nullable object must have a value.
at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Nullable`1.get_Value()
at EBP.Framework.Windows.Host.HostForm.ApplyOptions()
at EBP.Framework.Windows.Host.HostForm.InitializeOptions(IOptionsService optionsService)
at EBP.Framework.Windows.Host.HostForm.Initialize(String caption, Icon icon)
at EBP.Framework.Windows.Host.WinHost.OnModulesRegistered(Boolean isDynamic, Int32 progress)
at EBP.Framework.Common.Host.HostBase.InitializeApplication(ISharedHostedApplication application, Boolean isDynamic)
at EBP.Framework.Windows.Host.WinHost.InitializeApplication(ISharedHostedApplication application, Boolean isDynamic)
at EBP.Framework.Common.Host.HostBase.InitializeApplication(IHostedApplication application)
at EBP.Framework.Common.Host.HostBase.Run(IHostedApplication mainApplication, String[] args)
at EBP.Invoicing.Application.Progr