If you didn't update your Qtum wallet in time for the hard fork in February, it's not a problem. Simply download the new v27.1 release from Github:

https://t.co/gwsCqIkxi8

We get asked this all the time, people who missed the update want to know what to do. It's simple, just make sure you backup your old wallet first in case there's any issues, and then download the new version. Once the blockchain is synchronized, everything will work.