QMac does not have true multi-currency support and it does not store a table of currencies, so therefore you cannot batch edit them. An exchange rate is currently only stored on individual transactions AND does not link exchange rates for those transactions from a register with one currency to another register (in other words, changing the rate on one side of the transfer will not automatically update the other side). Lots of work still remains in this area.
QM does not seem to have any conversion feature at all. And I have run some reports where it mixed the currencies as if they were the same. (Maybe fixed in a recent update?)
QMac does not have true multi-currency support and it does not store a table of currencies, so therefore you cannot batch edit them. An exchange rate is currently only stored on individual transactions AND does not link exchange rates for those transactions from a register with one currency to another register (in other words, changing the rate on one side of the transfer will not automatically update the other side). Lots of work still remains in this area.