use MultiMC, it’s better than official and legacy launchers. and still receives support.

you could try using the interne archive if you are set on using TL legacy or use a different launcher like PollyMC

I had it on my computer. Note that its not a .exe but a .jar file. You will need java installed before you can run it. minecraft.jar

I recently checked ,it’s available https://llaun.ch/ or we are talking about different launcher