How to change the application pool to 64-bit pool?

Control Panel V10 > Hosting Control Panel
  1. Please sign in to your account and go to Control Panel.
  1. Go to Advance option.
  1. Click "Pool Manager", you will find all your application pools in the list, click "Actions" beside the target pool, then click "Change to 64-bit".

Current Control Panel screen

Current Control Panel screen