Does Xcon work now on iOS 7?

Now that Mobile Substrate has been updated to Cydia Substrate and most jailbreak apps should be working again, can someone please confirm for me if Xcon is now working as well? It seems that the app depends on Substrate so I'm hoping it works now.

Specifically, I need to know if the Japanese app ドワンゴPlay (Dwango Play) from the Japanese App Store will now work on jailbroken iPhones with iOS 7 and Xcon. I need to be sure the app will work properly before jail breaking since I have some tracks downloaded on the app whose download periods have passed which means I can't redownload them if I were to restore my iPhone into a non-jailbroken state. (A restore wipes all the tracks downloaded via the app.)

Any answers would be most appreciated.

I just installed xCon, because Skype would not work on my jailbroken iPhone 4 (iOS 7.0.4) and with xCon installed Skype crashes on startup. Also another Dutch application I have that requires xCon to function on a jailbroken device crashes on startup. So it seems to be dysfunctional.

Edit:
A very peculiar development: I have now uninstalled xCon and Skype works! Respringing and fully quitting the app seems to be fine (it still works afterwards). The other app I mentioned earlier fails to function properly however. So I wouldn't take any chances.

P.S.: Happy New Years from the Netherlands!