If you notice that the wrong Gmail account opens when you try to send an email out of Copper, you will need to update which account is your “default” account by doing the following:
1. Sign out of all of your Google accounts
2. Sign in to the account that you want to be your default account first (i.e. the account you would like to connect to Copper)
You can double check that this is the default account by clicking on the Google account selector and looking for the one labeled as “Default”.