Click on the start button, then in the start menu click on All Apps in the lower left corner. Scroll down through the apps to P and then find the Picasa 3 folder icon. Click on the Picasa 3 folder icon and it should show Picasa 3 as a choice. Click on the Picasa 3 choice and Picasa should start. Organize, edit, and share your photos Picasa 3.9. Now with Google+ sharing. Upload, Tag, and Transform your photos with Picasa 3.9. Organize, edit, and share your photos Picasa 3.9. Now with Google+ sharing. Upload, Tag, and Transform your photos with Picasa 3.9.