After having worked with iGo apps on 2DIN units pretty intensely for a few years now, I don't think this issue has anything to do with Primo itself - which is why a fresh Primo installation was never recommended. Also, the version that is on the unit is the version that the manufacturer included with the unit - nothing has been modified - it's not like the OP tried modifying a bunch of Primo-related "stuff" and "broke" something.

I think that you could put a WinCE file explorer on the GPS SD card (with the same name as the Primo executable) and have the exact same problems with the WinCE file explorer (cannot get back to 2DIN interface) - in fact, that would be a great test! I have a feeling that this is an issue with the 2DIN unit itself - either a "procedural" issue, an issue with the 2DIN configuration or possibly even a hardware issue with the 2DIN itself.

Primo itself works fine, which is why we haven't been concentrating on Primo-related modifications. The only issue is that the OP cannot successfully switch between the Navi and radio functions, which is typically not a function of Primo, but a function of the 2DIN unit. He should *not* need to exit Primo in order to get back to the main 2DIN interface and then have to restart Primo to get back to the navigation interface - can you imagine having to constantly exit and restart Primo every time you wanted to switch to/from the 2DIN interface?? That makes no sense.

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