TreePad was a personal information manager for Windows. It was a popular tool due to its mix of an organizer, database, and word processor capabilities. It also offered portable and free versions.
TreePad was available in different editions ranging from free (TreePad Lite and TreePad Viewer), for personal use (TreePad Plus and TreePad Safe) and for business use (TreePad Business and TreePad X Enterprise).
TreePad was created by Henk Hagedoorn from the software development company Freebyte (Freebyte Software Engineering), based in Almere, Netherlands. It was actively developed from 1995 until the middle of 2019.
Since August 2019, the app website was down until February 2020, when it was purchased by another non-software related company. The last app updates were published on February 5, 2018.
Since then, the software is no longer maintained and there is no customer support for it.
There is no official information why the web site ceased to exist and what happened to the company that was developing the application.
Compatibility & Availability
Despite the fact that Freebyte no longer maintains TreePad, existing versions of the organizer are generally still working properly under Windows 10 and older OS versions.
Even though original TreePad's website is dead, most app versions are still available for download on sites like Download.com (free and trial versions) and PortableFreeware.com (free portable version).
If you are looking for modern personal information manager replacement for TreePad, you may take a look at MyInfo. It is an actively developed and extremely popular TreePad alternative for Windows. It offers native import for .hjt files and similar functionality to all TreePad editions*
* - .hjt is the extension for the file format that TreePad used until version 7. If you have files using the newer .tpd file format, you may need to export them to .hjt first.