TkCommander represents many many hours (days !) of programming.
If you plan to use it on a regular basis, or if you use it for your business, you have to register it.
In addition to the support you provide, you will get rid of the annoying popups windows.
The registration fee for TkCommander is 20$ (21,6 euros).
You will then receive the full version without popus, and you will also receive updates up to 1.0 release.