Please help! This is not a downloading issue. The issue is that nothing happens when I click the App Catalog icon. Its halo appears, but does not launch. Preware and other data apps, except Updates, work fine.

Timeline:
Updated to 1.3.5, ran emergency migration, all worked fine.
Updated to 1.3.5.1, App Catalog is dead. Ran migration tool just for kicks, to no avail. Also ran EPR.

As for Updates, it opens and tells me there are updates available, but clicking on Show Updates does nothing.