All feed URLs default to network login url, all lost

[bambivalent]

Since updating to 3.3.0 :7f06bb62: (6805), this has happened twice. All (almost all) subscription URLs are gone, replaced by the network login page URL. The first time, I laboriously replace all feed addresses. Three WSJ URLs I can't find at all. Now again, three days later! Why? Is there a way to replace them from some library file? I have left the location with the network login page and am back on my own network. Not that that should matter…