Okay... so I ran the installer and it made me sign in with my Spitfire credentials and then it installed the new plugins. I think after it was done it was in some sort of standalone mode. In fact it installed a LABS.app. When you run it, it has a login screen that automatically logs you in to Spitfire's LABS server I suppose... so they retained the credentials.
Okay before I explain why I will probably be restoring from the APFS snapshot... Here's the new, ugly (IMHO) GUI:

- newlabsgui.jpg (213.4 KiB) Viewed 1417 times
All the free stuff works
if you're logged in on the internet...
It appears Spitfire is trying to sell users on paying for a
LABS+ subscription which gives you access to additional "premium" instruments that are designated as
LABS+. Now, you can ignore those and still use the new plug with just the existing free instruments, and I almost did, until I noticed that when I instantiated the new plugin in DP, a log in screen appeared in it's plugin window and my credentials were automatically entered. This, all before I saw the actual plugin GUI.
So for giggles, I quit DP, turned off my WiFi connection, then restarted DP and loaded the project that had the instance of the new LABS plugin. The GUI never came up... just this screen:

- labslogin-nowificonnection.jpg (87.22 KiB) Viewed 1417 times
YOU CANNOT ACCESS THE NORMAL LABS GUI WITHOUT LOGGING IN OVER THE INTERNET!!!!
Now your project will probably still play back, because I tried playing my MIDI controller and the instrument that was loaded when I saved the project could still be heard in the background, but unless you login, your ability to select different instruments or otherwise access the normal GUI is taken away!!
So yeah... the hell with that, Spitfire! The plugin and FREE instruments should be
completely functional when the user is offline. I admit, I usually am online, but that's not the point. If my internet goes down... LABS is broken. Existing projects
will play back, but forget changing instruments or instantiating the plugin and choosing an instrument. It would be interesting to see if I could get instruments to change using this inside Komplete Kontrol (which did work, BTW) and thus not need to access the plugin's GUI, but not worth the effort I think.
Soon as I post this, I'm booting my Mac into the recovery partition and saying bye bye to this new LABS.