Error Cannot insert license

Hello.
I have a small problem with my Avast and here’s what happened:

A few days ago my Windows 10 updated to latest version and next day i got a message saying that i’m using Avast Free anti-virus. This was really strange because a few weeks ago i have purchased avast Premier and it has updated from internet security to premier without a problem (also showed me that i have 360 days left). Now as i tried to re-enter my serial it gives me an error saying “Cannot insert license”, so i tried random key (not from web) and it gives me same message. By that i’m guessing something got wrong with my avast so uninstall it and install free version, no luck, i have downloaded Avast premier and still same message… I have tried to get the activation file from my avast account but somehow it’s not on the website (i have no idea why) but i still got the serial from my expired Internet security on there. Now i’m wondering are there any hidden avast folder where data is stored?

Thanks for reading and i hope someone can help me out, because it would be really annoying to lose all that money…

https://support.avast.com/article/Troubleshoot-activation

Contact support: https://support.avast.com/contact

I wouldn’t ask this here if that would work. And as i said i can’t activation file as somehow my premier code is not listed on avast page.

Contact support: https://support.avast.com/contact