That’s because you created a custom VST folder in the VST manager, called “Music_New”. Everything you install will go in the “default” folder and, if you want that to appear on the “Music_New” you can simply drag and drop it on the folder structure of your choosing within then VST manager window.
This way you can have various “collections” of plugins or VSTi.
Also, when you’re in the project window and want to load a new plugin or VSTi, the collection that will show up by default is the one you left open (the one that shows the name, in you case “Music_New”) on the VST manager window. There’s a small arrow in on the top right corner that let you choose the collection, both on the VST manager and on the project window while loading new plugins or VSTi.
I like this system, very helpful with a lot of plugins that you can organize the way you like.