Change the default image viewer to Picasa

[Imageman]

How may I change the default double-click image viewer to Picasa?  Thank you for your assistance . . . .

[Mario]

IMatch uses the same associated application as Windows.
Select a file in File Window and press <Alt>+<Enter> to open the Windows Explorer context menu.
Choose the Open with... > Choose another app command. Select the app you want to associate with the file format and enable the "Always" option. See the Windows help for details.