To coma8coma1; yes, you can edit code, it formats the code correctly and can also execute the code (if you press F5) by using QB64. You have to extract the files to your QB64 folder, since that's where the necessary dll files are (they aren't included as you are meant to have it in the QB64 folder anyway). There's some things in my editor that the QB64 editor doesn't have yet, like color selection, instant formatting when changing line, ASCII character set (as you can see in the video) and other features.
QB64 has many things that my editor lacks though, like instant syntax checking (you can press F6 to search for errors in my editor but it doesn't find all the errors that QB64 finds, though it may find some errors that QB64 can't yet find) but it can be good to have a alternative!