Which version of PHP GD Content Tools Pro plugin requires?
GD Content Tools Pro plugin requires one of the following PHP versions: 7.0, 7.1, 7.2, 7.3, 7.4, 8.0. The plugin might work with older PHP versions, but they are no longer tested or supported.
Which version of WordPress GD Content Tools Pro plugin requires?
GD Content Tools Pro plugin requires one of the following WordPress versions: 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6. The plugin might work with older WordPress versions, but they are no longer tested or supported.
Which version of ClassicPress (WordPress fork) GD Content Tools Pro plugin requires?
GD Content Tools Pro plugin requires one of the following ClassicPress versions: 1.0, 1.1, 1.2.
Which version of bbPress plugin GD Content Tools Pro plugin requires?
GD Content Tools Pro plugin requires one of the following bbPress plugin versions: 2.5, 2.6.
How old is GD Content Tools Pro plugin?
GD Content Tools Pro plugin is 5 years, 1 month old.
When was GD Content Tools Pro plugin first version released?
GD Content Tools Pro plugin was first released on September 20, 2016.
When was GD Content Tools Pro plugin latest version released?
GD Content Tools Pro plugin latest version 5.9.1 was released on July 23, 2021.
Where can I find list of changes in all GD Content Tools Pro plugin releases?
The detailed changelog for GD Content Tools Pro plugin is available here: GD Content Tools Pro Changelog.
Can I translate GD Content Tools Pro plugin to my language?

Yes. POT file is provided as a base for translation in the root folder for each plugin. Translation files should go into languages directory, and WordPress must be set to your language to load the file. As an alternative, translation file can go into wp-content/languages/plugins directory.

The file name for translated and compiled MO file must be the same as POT file with the addition of language code: {plugin-name}-{language-code}.mo.

You can check out this for translating plugins using POEdit program:
support.dev4press.com/kb/article/translating-plugins-or-themes-using-poedit

Does GD Content Tools Pro plugin works with WordPress MultiSite installations?

Yes. Each site in the network can activate and use the plugin.

Why GD Content Tools Pro plugin's JavaScript files are not loaded?

All Dev4Press plugins and addons require jQuery. But, they will work only if the jQuery is loaded with the WordPress proper Enqueue method. If you are replacing jQuery that comes with WordPress with some other version loaded from other location, my plugins will not function properly, and that goes the same for most of the other WordPress plugins that depend on the proper way for loading jQuery.