When going thru the check for update, if <offline-allowed> is specified then the process quickly times out and proceeds with the cached version.
If <offline-allowed> is not present it will not return untill every resource has been checked. Unfortunately if the check returns an Exception (like not found) the code returns as if the check showed that there is no update.
Removing a resource from the web is updating it, and should in this case not launch the app.
When a resource isn't there, we should treat it as updated, and prevent launching.