Edit: It's not working. I can't get MZ to recognize it in the plugin settings.
Could you please describe the problem in more details?
I've listed some possible issues below, please check if anything is relevant.
Also, I’ve made an example project using these plugins, you might want to see an example usage: https://рпг.укр/files/misc/2025/NewGamePlus_TitleChanger_example3.zip
Possible issues
The plugin doesn’t appear in the Plugin Manager?
Keep in mind that plugins don’t get installed automatically. You need to double-click empty space in the Plugin Manager’s Plugin List to add a new plugin, and then in the Name field select the plugin to install.
The plugins don’t show for selection in the Name field?
Make sure you copy the plugin file into js/plugins folder subfolder of your game folder. (You can open your game folder by the Game → Open Folder menu item.)
The plugin settings such as menu item label are ignored?
Make sure you use the exact filenames (including capitalization). If you rename the plugin files, they won’t work.
The correct names are GRB_TitleChanger.js and GRB_NewGamePlus.js (or GRB_NewGamePlus_MultiItem.js, if you use the alternative version) respectively.
If your are using Windows with default settings, then Windows might be hiding the .js extension from you. If all the other files in the js/plugins subfolder don’t have .js extension, then my plugins also don’t need it. In this case, just use GRB_TitleChanger and GRB_NewGamePlus, without .js (.js will still be there, but Windows will hide it).
(The relevant option in Windows is “Hide extensions for known file types”, in Windows 11 it’s hidden in the File Explorer under the “…” menu → Options → View subfolder.)
New Game+ is not removed after updating this game
This is a bug I've just noticed.
A workaround for this is: put GRB_TitleChanger above GRB_NewGamePlus in the plugin list.
I'll make a proper fix later (to allow placing the plugins in any order). For now, you can re-order plugins by dragging them in the Plugin Manager.
Something else?
Please describe what’s the problem and I will try to help.
Please try to be specific. What exactly are you trying to do? At what point of the process is MZ behaving contrary to your expectations?
— Dmy
Edit: I've update the example because I've noticed the order of plugins is important (title changer should go above new game+ plugin). I'll fix this later.