You can get help via the topic titled '"Official" Help Forum for WordPress Admin Bar Improved' or by starting a new topic, but I prefer the first option.
As far as coming up with big negatives from closed topics, those are all for versions of this plugin that are well over 6 months old. The plugin has been updated significantly since then, and there are no such issues now, mostly just tweaks/feature requests.
What exactly is it that you need help with? Finding the administrative screen for the plugin? Most plugins place an administrative screen in the WordPress Admin under the "Settings" menu. In the case of this plugin, it is under the Settings -> Admin Bar Improved menu item (if you are using the most recent version. Otherwise, it is located under Settings -> WPABI). Does that answer your question? If not, let me know and I'll try to help some more.