Thank YOU!

You can grab a FREE license here.
If you want to donate something, you can do that here..

License Entry:

Got an old license?

Click here to upgrade to the new format (checksum v1.3+) for FREE.

How to get your registration details into checksum..

The ONLY way to get your license details into checksum is via the registration dialog. And aside from a monthly reminder, the ONLY way to get to that is via checksum's About Box.

You can get to the About Box any time checksum is running by right-clicking checksum's System Tray icon. Choose the "About checksum" item.

In the About Box, click the big checksum icon and enter your registration details in the dialogs that appear. To force a new registration when one already exists, use Shift+Click. Tap/click/hover your mouse over the image here for a demo.

Once registered, your email address appears in the About Box, giving you the warm fuzzy glow that only fully licensed software can supply. If you want to change that text to something else, click the text.

If you have any problems with any aspect of your registration, get in touch! I will quickly sort it out.

Thank you!
Your support is appreciated!

Welcome to!

I'm always messing around with the back-end.. See a bug? Wait a minute and try again. Still see a bug? Mail Me!