Because they're generally used together, you'll normally want to launch both Hello and Picasa at the start of each session. You can launch them individually or perform an action in one that causes the other to launch. For example, selecting files in Picasa and clicking the Hello button results in Hello launching.
Launch Picasa and Hello. Depending on the options selected when you installed Hello and settings you've chosen in its Options dialog box, you can launch Hello in the following ways:
Otherwise, enter your Hello password (if it isn't already filled in) and click the Sign-In button. Hello's window appears (see page 127).