So to clarify:
THIS IS NOT THE INSTALLER:

This is (a rather poor and blurry picture of) the MX Linux live media's boot options menu. or simply "boot screen." If you call this the installer nobody will know what you're actually talking about and it will delay getting you help!
THIS IS THE INSTALLER:

This is the first screen of the MX Linux Installer which guides you through the procedure of installing MX onto your HDD or SSD. You have to run it by clicking on this icon on your Live System's desktop (outlined in red):

Hope this is helpful.
