Delpat wrote on May 18^th, 2021 at 8:47pm:

Good morning, I bought for the first time on your website the 777-200 for flight simulator and I don't know how to load the liveries for this plane and where to find your ACE? thank you

For some reason, the installer doesn't create a desktop shortcut for ACE.

Use the Windows finder/search to locate ACE - then "Open Location" and create a desktop shortcut to ACE.