Microsoft Expression Web is a "free" direct replacement for your aging Frontpage (Literally, you'll think you just upgraded the same program)
However, MS stopped making it available directly... BUT
Do a search for the program, you'll find a MS forum link that will get you going in the right direction.https://answers.microsoft.com/en-us/windows/forum/all/microsoft-expression-web-4-download/e6a4eba5-2d7e-4eed-8fab-c945a83215c4YouYou should be up and running in no time, (no issues on WIN11 by the way)