On March 7th, Google suspended WinStars due to non-compliance with the program’s update method. Indeed, Google requires developers to use two files to download data and update applications.
I had chosen to keep the update method developed for the desktop version, which consumes less download volume, which seemed beneficial for a mobile version.
Therefore, if you wish to continue using the Android version of WinStars, you must uninstall the program and reinstall the application using this package: