(solved) LinuxLite 2.4 64bit Thinks it's 2.2 after update - Won't boot

[rokytnji]

So I downloaded and installed it.

How? Was a md5sum check done 1st?

Actually a full install into a 32g USB stick from the live version, using 'something else' - separate partitions for boot, root, home, etc.

what file system was used on the pendrive install on the different partitions when you went with a conventional install?

I then went to 'install updates' and did so. No errors reported. Unfortunately I then shut down and attempted to reboot. But Grub now showed v2.2. And, of course, it won't boot.

Hard to tell what happened from here. If me. I'd plug the usb drive in my other linux laptop.
Open my pendrive in gparted and look at it in case it is covered in writes (all yellow, no white)
Then unmount it in gparted with right click.
Then run a check using right click again in gparted.

Let it do the fsck on my pendrive. Then try to boot it again.
It sounds like you might have corrupted the file system with a improper unmount of the pendrive.