That's right - without a backend server, I couldn't think of a great way to manage a private API key. That means that users have to sign up for their own keys (

That's right - without a backend server, I couldn't think of a great way to manage a private API key. That means that users have to sign up for their own keys (instructions on the "Currency Sync" page under "Settings") if they want to use currency sync. I thought I'd added a description to the error you get if you're still using the default "demo" key - clearly not, I'll add that it.