If you still encounter difficulties, take the following steps:
Try to update to the latest version at the time of writing this text is 1.2.4.
Force update currency rates in the plugin settings.
Also make sure that the source CurrencyRate.Today is used (it is worth considering that the time of updating the rates is once an hour). In the future we plan to shorten the update time of exchange rates. Keep an eye on our new versions.
Also if you need real-time bitcoin rates, you can use our plugin: