Click on the reagent bank slot icon. You can do the same with any other slot.
Enable "Reverse slot ordering" at Bagnon frame options menu.
Right click on the sorting button at the top of the bank window.
Long answer: In Bagnon's options menu, you need to have the option "Enable databroker frame" ticked. If that is enabled, you should see an area looking like "< >" on the lower end of the bag window, next to the money display. Those "< >" are arrows on which you can click to cycle through your Broker plugins, like CurrencyTracker.
When you have no other plugins, CurrencyTracker should show right up, otherwise you'll have to click a few times until you see either your tracked currencies or just the text "CurrencyTracker". If the latter shows up, just click the text and mark your currencies you want to watch.
The search syntax has changed recently. For instance, searching by level 30 should be written has
lvl:30 (or simply
30), instead of
ilvl:30. Details about the syntax can be found here.
Make sure that you have not accidentally hidden a bag from within Bagnon's windows.
Bagnon does not really know when you remove a character or transferred it to other server, so you need to delete that character's information manually.
To do so, open up a Bagnon frame, and click the player selector button (the icon in the top left of the window that matches your character race and gender). From there, you can select and delete information about any character that you're not currently logged onto.
We do not have plans on implementing support. If you want that kind of information, you should probably check out an addon that stores more information about your characters, such as Armory or Altoholic.