To uninstall Picasa, choose your operating system and follow these steps.
Windows- On your computer's taskbar, click Start.
- Select All Programs > Picasa > Uninstall.
- In the confirmation window, click Uninstall.
- To remove your database and permanently remove Picasa, click Yes. If you plan to reinstall it, click No.
- Click Finish.
- From the Applications folder, drag Picasa to the trash.
- To remove your database and Picasa permanently:
- Open Finder.
- Go to [username] > Library.
- Double-click Application Support > Google > Picasa 3.
- In the Picasa 3 folder, locate "db3".
- Drag "db3" into the trash.
If you want to maintain your edits, export your photos.