Once you upgrade to Speechdio Business, you will have the ability to upload your script in a text file instead of pasting script or typing scripts inside the app. 

So, to confirm if your Speechdio Business upgrade is active or not, simply login to your Speechdio app and create a new file by clicking Add new on your dashboard.

You will find a checkbox for Upload file above your text box. If you see this option your Business Upgrade is already active.