The license of the application is now free. There is no PAID or PRO version to acquire. Technically, you should be able to download the PAID version if you purchased it, but if the developer choose to turn it into a free app, then you are entitled for a refund. However, the best way to overcome this issue is through contact. Use the email below to get in touch with the developer of the application.
Contact page: android.embware@gmail.com