Click the Albums icon in the left sidebar.

Select an Album, then click the info icon at the top of the right sidebar to access the Info Panel.

Scroll down to the Shared Album section and click the Publish Shared Album button.

Read the Terms of Service and Right to Publish Content notices, check the box next to each item if you agree, and then click Continue.

Select options in the Publish Shared Album dialog.

Click the Share button when you're ready. Wait for the upload to complete before quitting Mylio Photos.