The 4.0.1 version of MiriSystems for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free Mac app is a product of Miri Systems, LLC. The application lies within Security Tools, more precisely Personal Security.
From the developer:
Miri Systems is an application that uses proprietary technology to log in users automatically and securely to access information on the Miri Systems website. All you need to do is activate your login credentials and enter the password, so you can receive a MiriID for secure connection.
You may want to check out more Mac applications, such as Key Holder or PasswordVault Lite, which might be related to MiriSystems.