LyX 2.3.0 installation broke Acrobat

[CarLaTeX]

I have Windows 10, with a TeX Live 2018 distribution updated today.
All worked perfectly before I installed LyX 2.3.0.
Now, when I compile a document, no pdf is shown nor created, and, if I try
to open a previously created pdf with Acrobat, I get "Fatal error: Acrobat
failed to connect to the DDE server".
Can anybody help me?
Thanks,
Carla