DrDownload Digital Downloads

I am unable to open this app in Shopify. My customers has purchased my products but has not received the download link. I have checked the order page but cannot find the download button. Please respond and resolve the problem as soon as possible.

Thank you!

When it works, it works fine - easy to use, basic but does the job.
But their server are offline quite often.
Every time I need to use the app, it's down or incredibly slow.

UPDATE 7/3/2024 I have been without service for 4 days and have had zero support from the app developer, customer support and even Shopify has not been able to communicate with them.
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I currently use this app. Presentation isn't a wow. very basic, but functions perfectly. My customer emails are sent in under a minute. No complaints. I've used chat and received help quickly. I would def recommend it.