I bought the app a few years ago, and it was my goto app, to ensure my mac ran virus free. For most of this year, and particularly during this virus pandemic, my app has simply stopped working adn even shows a question mark screen, where teh app used to be. The app is held in my apple app store cloud, adn eahc time I try and re-download it, it gets to the end of the download, and simply does not install, or even download. I also have the same problem with the standard version (non pro version) I have emailed customer services many times, for help and advice, feeling somewhat exposed, and 7 months later, still no reply