That's a tactic that should get SiriusXM customer's attention. The new version of the SiriusXM app released this week has moved to version 1.6, but the app must be updated or the older version will stop working.
The satellite radio company says the app adds "required location awareness in compliance with new content provider policies". If the app is not updated, the older version will stop working, so to avoid any surprises it would be best to get the new version. In a past update, many SiriusXM apps lost the login information, but this version seems to protect it, so after you get the new one, and it downloads some graphics, you should be good to go.