Today I have left 30 days of avast 7.1474 but when I click on “register”, it does “Informations are renewed, please wait” and nothing happens as this tab just dissapears 
I even get code from offline registration, but I can’t see where I should put it I really like avast and want it registered.
We’ll that would be helpful in case I actually HAD that. I don’t have that tab for offline registration in my maintenance menu :o So I can’t re-register it?
It should appear sooner or later, wait a few days.
Okay. I’ll wait. I will ask again if it won’t appear within five days…
OK, see you around.
I can’t help myself, but just out of curiosity - will I have to re-install avast, if that tab won’t appear? And will I have the licence as normal or telling me I have 30 days left and unable to re-register?
Don’t worry, it will appear. 
Really? Last time I used offline registration was back away in avast 4 long long ago. So I was badly surprised to see it doesn’t want to register in normal way.
Yes.
Okay. I’ll just wait then
Please do so.
Wanted to say, I tried once again normal registration and it worked! Thank you for your help Asyn 
You’re welcome.