Can't synchronize avast password

Hi guys. Some days ago formatting my pc I forgot to export my password archive from avast. Now I reinstalled Avast and it ask me to authorize the current device from another authorized device (impossible because my pc was formatted) to synchronize my passwords.
Is there a way to recover my passwords? Just consider that i know my master-password.
Thanks in advance(and sorry for bad english).

Hello, you should follow this guide
https://support.avast.com/en-us/article/92