Okay, I'm good to go for another round 
In the terminal;
sudo nano /etc/default/grub
nano is a terminal text editor. Now use the arrow keys and find GRUB_DEFAULT=0 and change it to GRUB_DEFAULT=saved
next Add GRUB_SAVEDEFAULT=true
Save = ctrl+o
Exit = ctrl+x
then
sudo update-grub
reboot.
Then hit tab or esc at the M.B. splash screen to get to Advanced Options for Zorin and select kernel 5.4.0 and boot into it.