Rand McNally GPS

Have the Xsite Infotainment System in our new Winnebago. Great unit. GPS worked great until today when I downloaded map updates. As with most new GPS units, the first update was somewhat large and took 45 minutes. When I ejected the SD card from my Mac and put it back in the Xsite, the GPS system would not boot. Multiple errors. Contacted support and told to perform a diagnostic/repair from within the RM Dock software. Tried it twice. No luck. I was told that several users had reported this today and engineers were working on it. Told to call back next week. I explained that I would not have access to my computer next week as I would be traveling, hopefully with the GPS working. Said I'd call back tomorrow. Don't know if this affects updates for all of the RM mapping devices or not. You may want to avoid updates until you are sure you won't have problems. Back to the iPad for GPS I guess until a fix is available. Surprised they didn't test the update before releasing. Disappointing as the RV is only two weeks old.