Hello and sorry you're having problems. Yes, all Kindles need to be updated according to Amazon in order to continue using them. Please click on the link below and follow the instructions there:
That link shows all of the models, and gives instructions on how to update the Kindle. There is also another link here so you can determine which model of Kindle that you have:
As well as one more to determine your software version:
If you need further assistance let me know. Please do not forget to click at least a 3 STAR RATING, at the top of the page for my efforts. You can follow up at any time if needed.