I can not find my wallet

#1

Hi there,
I logged in for the first time in 2 years.
Then I can not find my wallet.
System has changed??

#2

No more web wallet anymore, please use your backup private-key and import to other wallet

#3

How do you do this? I have my user name, password and master security code but i don’t know what to do next - please can you advise step by step guide - thanks