Hi,
The issues described are bugs in the new version of VS 2010. At the moment, the simplest way is to ignore the message :) The message is shown because of a bug but it's a false message, you can use the DLLs with .NET 3.5.
By the way, this issue happens with multiple frameworks, so if you encounter it it's very likely to be a false message.
Regards,
Elisha,
Typemock Support