Downloaded designer yesterday to reinstall on my new hard disk. As a result, I got this URL in a marketing email (about resources I didn't know existed):
it takes me to the overview help which works, BUT clicking any of the links on that page gets you
Guide views_extjscomp was not found.
Maybe it was renamed to something else? Or maybe it has passed away permanently to the 404 land? This would be sad. Hopefully it's just a bug in our side. Report it to Sencha Forum if you feel so.
Sorry for all this
The link to the sencha forum is to a closed thread. The fix is to change the URL to
http://docs.sencha.com/architect/2-0/#!/guide and then it works, but someone getting a marketing email might just think your product has poor quality. Either way, no one bothered to test this stuff before it was widely distributed.