Just started having problems with windows desktop version of Integrated messaging today. Was using it fine, it disappeared, and then came back to the set up screen. Go through process, when I enter the pin received on my phone, the app says "Invalid pin.". I've uninstalled and reinstalled the program on my desktop, reset my phone, etc. Still not working.
There was a server issue last week that might have interrupted your app.
If this is still an issue, please let me know here.