TOPIC: Can't find any documentation on SSL Plugin

Can anybody tell me how to properly use the SSL Plugin?

Do I need to configure every menu entry for the plugin or just DTRegister menu links?

When do I use OFF or Ignore?

I set it up for a menu link to DTRegister and I see the HTTPS: address displayed in the address bar for a fraction of a second, then the HTTP: address replaces it.

You don't need to do any other that with the menu items themselves. Simply install and enable the SSL plugin that comes with the package. Here is what is stated in the readme file:

This plugin is optional. If you install and enable this plugin, all DT Register links will be secure using a https. Then when you leave DT Register and go to any other part of your site, it will return to a non-secure http link, unless you specify in the parameters other components to ignore so their own SSL settings will be applied.