I just installed X30 and X31 and I had to unlock again, using up one of my unlocks. Is this normal?

I think so, it was the same when I upgraded LFS to X31.

Yes, if the unlock algorithm or one of the checked files changes, you have to unlock again.

Thanks, but should it count as an unlock. Also the user agreement says you get an unlock on Friday morning. Is it my local time Friday morning?

It's very likely UTC/GMT morning, not your morning

Quote from jimimonet :

Thanks, but should it count as an unlock.

Yes. It's not a problem really as you only used 1 of 2 unlocks.

Quote :

Also the user agreement says you get an unlock on Friday morning. Is it my local time Friday morning?

uk time.