This application is not supported on this computer. Installation has been disabled.
The Chromium team has acknowledged this as a bug but it still needs to be fixed.
The interim solution
Fortunately Lauricio Su came up with a nice workaround and posted it in the Tincr discussion group. Basically his solution is to run Chrome in Windows 7 compatibility mode and install Tincr. After that Chrome can be started in the normal way and Tincr will work just fine.
This worked just fine for me with one addition. I had to keep once instance of Chrome running before starting a new instance in compatibility mode. Without that Chrome would not get a connection to the Internet.