The file is a multi-part archive typically associated with the Nighttime Imaging 'N' Astronomy (N.I.N.A.) software, a popular open-source tool for astrophotography.

: If you use an autoguider, follow the N.I.N.A. Imaging Tutorial to connect your camera and start guiding via the Guiding tab.

: Go to the Equipment tab to connect your camera, mount, and focuser.

To use this file, you must treat it as part of a split archive rather than a standalone installer. How to Open and Install