Sorry to hear.
For those curious, BMW is updating cars for free in the UK at this point to fix the vulnerability but not in the states. Apparently the "dead zone" in the factory alarm is only in effect for RHD vehicles. Though if you don't have an alarm any way, it doesn't really matter.
It is ridiculous that BMW is not covering an update on LHD vehicles right now, I guess it's because there have been no reports of this occurring in the States, yet. I saw this thread and thought maybe finally it had happened over here.