Can I change account types?

Yes, once you create an account you can change its type, but there are some restrictions. For example, you can change an account type that doesn't support investment transactions to another non-investment type, but you can't change an investment account to a non-investment based account. If you accidentally set up an account with the wrong type that you need to change it to a completely different type, simply create a new account with the correct type, then cut and paste all the transactions from the old account into the new one. Be sure to use the "Cut" command instead of "Copy," or else the transfers in the account may create duplicates in other accounts.