Problems with translations on booking page

Hello.

We just install new version of your appointments+ plugin and we have some questions about translations.

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So on page http://podzamkom.com.ua/make-an-appointment/ we cant translate following words:
Service provider:
Date and time:
Lasts (approx):
Price:

But we translate this words in /wp-content/languages/plugins/appointments-ru_RU.po and appointments-ru_RU.mo

With all others text there is no problem, all translated and displayed, problem only with this text.

How can we fix that?

And second question. How can we change displayed currency USD?