Ok so I just found out why the currency was set to British Pound. It was because I had the display language set to English. Why the hell is the currency linked to the display language of Avast? Which moron thought that that was a good idea? Not everyone using the English version of Windows or Avast or any other product actually lives in the UK! This HAS to change ASAP or I am gonna use a different antivirus!
How often do you buy Avast products that this is an issue?
Ze doen wel meer domme dingen 
After this, NEVER!
Look on the bright side. You can actually check the prizes using different Avast languages and then choose the best offer 
And if you don’t want to bloat your main system with multiple language versions, you can do this from VM, then transfer the license.
Out of curiosity, which currency is used when you choose the “Pirate talk” language? 
Doubloons. Obviously.
;D 8)