I updated software to 13.0 as it was freezing on sat nav and the kenwood site recommended to do so. Worked fine for a day or so and then the sat nav frze again. Then it would not come on, vw log showing constantly. All other features were still working. Thought I would try to reload the update but when it completed and I removed the sub device as told it won't re start and is per inanely in update mode?