"New Editor" Problems

I use the browser version of WordPress for my site middleofnowheregaming.com and it automatically switched all of my writers over to the “new editor” when writing new stories. For some reason when they save their drafts, it deletes all of their categories and tags. However, I was able to switch to the “Old Editor” and that seems to save everything just fine like it used to. How can I solve the “New Editor” problem for my writers? Is there a way to force switch all of them to the “Old Editor”? Is there a way for them to switch it if I can’t? They are reporting that they don’t see any link on the page to switch.