License

Darhon Software creates applications for different platforms using Qt libraries under the GNU Lesser General Public License (LGPL) version 2.1.

The LGPL does permit users to license software programs that merely link with the LGPL licensed library under different license terms provided certain requirements are met. In essence this means that our software may be distributed under GNU General Public License (GPL) or under Proprietary License that dynamically link to the LGPL-licensed Qt libraries provided.

Regardless of the applying license agreement, our applications are available in any of two distributions: Paid and Free. The actual distribution will depend on the targeted platform. The same application may be a Free distribution in one platform and a Paid distribution in another one. 

Open Source

The software distributed by our site under GNU General Public License (GPL) follows the philosophy of the Open Source (OSS) initiative. The following definitions summarizes the main criteria for the software licensed under GPL:

  • Free redistribution: No restriction to any party from giving away the software and no royalty is required for this action.
  • Source code: The source code is available to be downloaded.
  • Derived work: Modifications are allowed and derived works can be distributed under the same terms as the license of the original software.
  • No discrimination: There are not discriminations against any person or group of persons or fields of endeavor.
  • Technological neutral: No provision of the license may be predicated on any individual technology or style of interface.

Close Source

The software distributed by our site under Proprietary License delineates the specific terms of use in an End-User License Agreement (EULA). You agree to this license from the moment you download the software and install it in your computer or device.

Darhon Software exercises certain exclusive rights over the software summarizing below:

  • Use of the software: No restrictions for the use of the software applies, except for the one inherits from the version model (Silver and Gold).
  • Inspection and modification of source code: The software is distributed in binary format and source code is not available for the end user.
  • Redistribution: There are no restrictions in redistributing and sharing with others, excepting the ones inherits from the version model (Silver and Gold).
  • No discrimination: There are not discriminations against any person or group of persons or fields of endeavor.

Distribution & Version

Free

The package for a Free distribution can be downloaded freely and used under our license agreement published in the product's page. The Gold version is free of charge and it comes with all its functionality and features fully available and there is no need to purchase any activation code. 

Paid

The package for a Paid distribution can be downloaded freely and used under our license agreement published in the product's page. The Silver version is free of charge and it comes only with the common functionality required for a basic user. This version allows the user to go through the application, learn its functionality without time restriction and still get a useful tool for the basic needs. Therefore, in order to unlock the more advanced features, you will need to purchase a Gold version.

Apart from the restricted features applied to the Silver version, both versions are identical. You do not have an expiration period with the Silver version. You do not need to re-install the software once you get the activation code, simply enter the code to continue using the software and all your data will remain intact.