I just uploaded a new version (v0.0.4) which is an step forward to eliminate the limitation among different accounts, but it's still limited due to the fact there is no way (in current test net 11) to transfer ownership of an StructuredData.
So now if you transfer from a wallet in account A to a wallet created in account B, the wallet in account B will receive the coins with no issues, the balance is updated and the coins accepted. But those coins won't be transferable anymore, since the recipient (account B) doesn't have the ownership of the coin's SD to make the modifications needed for a new transfer, it can just read it now (Asymmetric encryption). So what happens is that if wallet in account B tries to transfer them to another wallet (even within the same account), the app will freeze, in that case just refresh the page and create another wallet to keep playing
I don't think I'll will be able to make some more workarounds to overcome this current limitation, we'll need to wait until the MDs are available I guess.
I recommend you to create new wallets and get more coins from the faucet, it's very likely the current wallets you have already created won't work since the notification channel now makes use of AppendableData.