Not sure why I am responding since I am only guessing, but AF board needs the traffic, so what the heck!
I would imagine you need to rollover the IRA, or you should be able to do an exchange if its within the same fund family or brokerage.
In taxable, I assume you need to sell and then buy the new fund.
Again, only assuming and guessing here, so I have probably been next to useless!
Brian