Thank you for the reply.
@Ian : The Navigraph navdata software isn’t installed on my computer anymore (so i can not remove the old airac cycle by clicking the button in the software), but the software gets shown on the deinstallation page as shown in my first post.
@NAVData : correct, i deinstalled the software without the windows deinstallation routine. Now i’m stuck. Because i can not reinstal the beta 23 version again “Installation Aborted” “Setup was not completed successfully”
Is there a way to get the files back in any way without the installer? maybe a “unziped” version that i can put into the directory manually? Seems like my deinstallation has not cleared all links in the background and my computer is thinking the software is still installed.