Hi Ohresser,
We are glad to announce that our WinRT Service pack for Vol 1, 2014 (ie 12.1.0.46) is rolled out and is available for download under the following link. The fix for the issue “COM exception is displayed in the designer” is available in this release.
http://www.syncfusion.com/downloads/winrt-service-packs
We thank you for your support and appreciate your patience in waiting for this release. Please get in touch with us if you would require any further assistance.
Regards,
Suresh