Many users successfully run Libronix 3.0f on Windows 10/11 using :

Today, you cannot buy a new Libronix license. If you find an old CD-ROM in a seminary bookstore, it likely cannot be activated.

Unfortunately, Logos 4 was not backward-compatible with the Libronix engine. Users had to their entire libraries in the new .logos4 format. While Logos provided free cross-grades for most books, the transition was painful for users with slow internet or older computers.