Hi David,
We regret for the inconvenience caused.
The installation issue might occur if some of the registry entries are not properly removed during the previous uninstallation. In order to resolve this issue, Could you please follow the steps suggested in the below KB article link?
http://www.syncfusion.com/kb/5119 If you still face the same issue, could you please follow the steps suggested in the below KB article link and send us the zip file which consists of
Syncfusion Installer logs generated by our tool ? ? It would be much helpful for us to resolve the reported issue at the earliest.
http://www.syncfusion.com/kb/2331 Please let us know if you need any further assistance on this.
Regards,
Manivannan S.