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 :)