Could you allow the user to rename the title of a mod element?
Issue comments
I was just about to ask this and wasn't able to post more than one issue. I found a typo in the names I was using and wanted to correct them. I was able to do the find/replace and correct the code references, but there isn't an edit/rename on the actual java files or a means to copy and remove the old. This would be a very helpful feature for us who know Java and want to clean up our own code. It's got my vote!
I think you can duplicate the elements by changing the name, although if the mod has already been used in a world those blocks will disappear, I do not know if it is what you are looking for but I hope it helps someone. Sorry if my English has been bad, I have used the Google translator which is not very reliable.
Due to the way MCreator stores data, this is currently not possible, but might be implemented in MCreator 2.x.x series.