I'll be happy to share with you some insights about using multicurrency.
Once the home currency is selected during the initial setup of your QBDT software, the option to change it is currently unavailable. As a workaround, you can consider utilizing the Multicurrency feature to set US dollars (USD) as your home currency.
Before we start, please know that you can no longer deactivate the feature once it's turned on. In this case, I'd suggest creating a backup of your company file before activating Multicurrency.
Meanwhile, here are the steps to activate Multicurrency:
Go to the Edit menu, then choose Preferences.
Select Multiple Currencies on the left menu.
Choose the CompanyPreferences tab.
Toggle the Yes, I use more than one currency radio button.