Thanks for contacting Syncfusion support.
We suspect that the reported issue occurred as you have installed Visual Studio 2015 after installing the Syncfusion Essential Studio setup. Please click on the Recheck
button at the bottom of the Syncfusion Control Panel to refresh the recently installed software list in your machine.
After clicking the Recheck button, first install the Syncfusion framework version 4.6 assemblies in GAC using Syncfusion Assembly Manager
and then run the ToolBoxInstaller
Please refer the following documentation links to know about these utilities.Assembly Manager:
https://help.syncfusion.com/common/essential-studio/utilities#assembly-manager Toolbox Installer:
Now, you can configure the Syncfusion controls in Visual Studio 2015 successfully.
If you still face the same issue, please follow the steps suggested in the below KB article link and send us the zip file which consists of complete Syncfusion Installer logs generated by our tool. It would be much helpful for us to analyze the reported issue.http://www.syncfusion.com/kb/2331