Sorry for the confusion.
When we launched Infuse 5 last year, we tried to make the news as widely known as possible. This included a blog post, 2 newsletters, and a one-time popup that appeared in the Infuse 4 app.
This allowed us to reach most of our user base, but of course it’s simply impossible to connect with everyone. Apple does not provide any contact info whatsoever to developers for people who download or purchase apps or In-App Purchases. Overall this is a good decision on their part, but it can present a challenge when you need to get a message to your users.
Anyways, Infuse 5 is a pretty great update with quite a new features. More info on everything that’s new can be found here.