When I attempt to add the fund in Quicken using the ticker symbol it certainly finds it, so I'd expect you should be able to also.
Typical "exchanges" between different funds within a fund family are tax-free, (and I assume that is the case here, but check to make sure), and are entered into Quicken using the "Mutual Fund Conversion" action. Make a backup of your file, make sure the old fund isn't using "average cost" - change that if it is - and use that action to record the exchange.
