When I downloaded unity(The New version) It came with Visual Basic now it says my Visual Basic free trial is over so how do I edit my code? Before unity used monodevelop but I can’t find that application and I didn’t uninstall it.
I think registering should be enough to continue using it. But if you want to go to monodevelop, i reccomend you download Xamarin studio, it includes the latest monodevelop but adds much omre functionality for developers (comparing to mono that used to be shipped with unity). Than In Unity you go to preferences/external tools/external script editor and find path to xamarin executable. and It should work.