Depends on how you perform the upgrade. I'd recommend backing up what you have and just trygit stash git pull git stash apply
It should probably just work, but you may get "merge conflicts" that you'll have to resolve.
I have enabled emailing of forum news summaries (What's new? emails)
But the sending time at 7:00 doesn't suit me, so how do I change the sending time of these mails?