You've developed an application without having a developer license. And from that day on you're using it in your environment.

But you realize a month later that you cannot launch your application from the Modern UI.

Problem: My developer license has expired.How can I reinstall it?

Solution: Normally you can install an application (should have a .appx file extension) using a single Poweshell command.

But from Visual Studio when you build and run your application, this error will be displayed:

error1.png

The solution is simple!

You need to rebuild your application.Then it will refresh your package and you're free to use it for the next 30 days :)