Hi Brian,
Thank you for your interest in Syncfusion Essential Studio.
In order to toggle the specific version setting, the Visual Studio comes with a property called SpecificVersion. Please refer the following steps to make your project pickup the 6.1.0.34 assemblies from the 5.2.0.39 version.
1. Ensure that you have 6.1.0.34 assemblies in the PublicAssemblies folder(C:\Program Files\Microsoft Visual Studio 8\Common7\IDE\PublicAssemblies) and in the GAC(C:\Windows\Assembly).
2. If not, run the AssemblyManager of 6.1.0.34 from the Dashboard and install the assemblies of this version.
3. Delete the project output folders.
4. Open your project. In the SolutionExplorer, under the References tree, select all the Syncfusion assembly references and change their 'SpecificVersion' property to be false.
5. Compile the project.
Please refer the below image that shows this setting.
http://websamples.syncfusion.com/samples/Install/specificversion.pngYour project will then look like this.
[csproj]
False
Please try this and let me know if this helps.
Regards,
Nanda