Hi Vivek,
Thank you for using Syncfusion products.
We would like to inform you that we started providing 4.0 Framework support from the version 8.2.x.x. So, our Essential Studio v6.1.0.34 is not compatible with .NET Framework 4.0. We would recommend you to use v8.2.x.x or later version to get 4.0 Framework support.
Please let us know if you need any further assistance on this.
Regards,
Vadivel N