There are versions for Windows and Linux available here.
The Windows version should be easy to install – just download the installer and run it (with administrator privileges). IMPORTANT: You may be asked to install “Java Runtime Environment 11”. In that case, download the Java software from the website you are sent to, and during the installation make sure to select “Set JAVA_HOME variable” and “JavaSoft (Oracle) registry keys”.
The Linux version needs some compiling on your system – instructions are included in the tar-file (unpack it with “tar -xzf Mist_1.0.3_Linux.tgz”).
tar -xzf Mist_1.0.3_Linux.tgz