EntityFramework.Extended Update not working - can't convert DynamicProxy

Question

I am using Entity Framework 6 and tried to use EntityFramework.Extended to do some batch updates:

db.TicketOrderItems
  .Where(i => !i.IsDeleted && !i.Order.IsCompleted && i.Order.OrderDate < margin)
  .Update(i => new TicketOrderItem { IsDeleted = true });

TicketOrderItem is an extension of OrderItem. When this is now executed I get the following error (translated from german, as I get it in german):

The EntityFramework.Reflection.DynamicProxy-type can not implicitly be converted 
to System.Data.Objects.ObjectQuery<NAMESPACE.TicketOrderItem>.

I already disabled lazy loading and proxy generation (and verified it via debugging, that no proxies are generated):

db.Configuration.LazyLoadingEnabled = false;
db.Configuration.ProxyCreationEnabled = false;

Is there a way to fix that?
Or is this a bug in the "not yet final" EF 6 or an incompability between EF.Extended and EF 6?

Answer 1

This works not with the current version of EF.Extended.