Posted on: 17 September, 2019 - 10:16
Step 1: Go To Start menu 
and search for Deactivate Matlab.
Step 2: Click on Deactivate. When done click on close.
Step 3: Then again go to start menu and search for Activate Matlab.
Step 4: Next.
Step 5: Add your AUS email address and password.
Step 6: Choose the license then Next.
Step 7: Click on Next then Confirm and Done!