Bad news: KRSTJ for MacOS, Linux & Windows 10 are no longer available for some reasons:

1- Messege from apple: You can't install KRSTJ on browser. You can only install apps on app store (for MacOS)

2- When you're trying to install KRSTJ for Linux, It gave you an error for no reason

3- Microsoft won't trust KRSTJ.Appx to install this app for Windows 10

I know it's so sad. but you can download KRSTJ for Windows (.exe), Android & Fire HD (Amazon)

Please don't disturb