The latest version (4.32.01) brings iOS 4.3.2 (GSM) and iOS 4.2.7 (CDMA) support. Additionally, the new version also comes with a new feature which will automatically take you to the TinyUmbrella website when you’re running an outdated version (although, we’ll always let you know when there’s a new update).
Once again, to save your SHSH blobs, all you have to do is connect your iDevice via USB to your computer, launch TinyUmbrella, and click the “Save SHSH” button.
You can download the newest version of TinyUmbrella from here. The software will run on Windows and OS X.
Keep in mind, it’s always good to backup your SHSH blobs as they are required to downgrade to previous firmwares Apple is no longer signing.