I released Text File Splitter 2 about a week ago. Had to fix a couple things right away, so the version number is 2.0.2 at the moment.

I was finally able to add the autoupdate feature. This feature can be used in two ways:

1) Through the menu

You will see some action on the right hand side of the form like this:

2) Running the wyUpdate.exe program manually

You will see this dialog right after you run wyUpdate.exe:

The best thing about the auto update is that you have the ability to update the program even if it is not working.

I'm in the process of fleshing out the Software Development Kit (SDK) for Text File Splitter.