How can I switch between my client and Personal Account on the Invoice App?

JayLode

I'm a newbie. I need some help understanding the Invoice App. A client invited me and I set up an online Wave account. Online I can see my Personal Account but in the Wave Invoice app I cant switch to my Personal account, only my client is listed under the Switch Business feature. Are accounts identified by email? I assumed that I would be able to switch back and forth on the App as well. Thanks!!!