Hi,
Thank you very much for your feedback!
Let's tart with the second question. The sentence "Occasionally the copyright holder may post a request for a donation in support of this software." means that sometimes if we decide it is necessary, we can publish only on our web site request for donations, which are only for DGV Extension and not for applications that are using it. The end users of yours or any others applications will not be involved anyhow in that donation request, so do not worry about it.
The answer to your first question is:
Check out in our Developers manual chapter '2.3 Open settings editor for a managed grid view' there is the following example how to open the settings dialog:
using CompletIT.Windows.DataGridViewExtension;
//Note! You can show the settings editor
//dialog only for already managed grid view.
DataGridViewExtensionComponent.ExtensionUI.ShowEditor( dataGridView );
If you have any other questions do not hesitate to contact us.
Sincerely Yours
Support Team