Invoice Maker・Estimate App

I have been using the for about three weeks now and it will not let me transfer an estimate to an invoice. How is this done? Other than this issue it is working great for us.

Works great for me, only downside is there is nowhere to put my name, I would like to be able to drag and drop a couple boxes. For example, I am required to have my business name as well as my name and there are not separate fields.

I downloaded the app and spent 20 minutes setting up the company info, product type, prices...only for the app to not create a sample invoice. No matter what I tried, I could not get it to produce a sample invoice to look at. I think is intentional because each time I tried to view the invoice, a window would pop up, hitting me up for $50 annual subscription. I declined and will delete this app as there is no way to see if this works for me, unless I actually pay for a whole year in advance.