Alright. If your GHI backpack has gone off screen then you have two options.
The easy one:
- Open game menu.
- "Interface" button.
- "Addons" tab.
- "Gryphonheart Items" menu item.
- "GHI Backpack Icon" submenu item.
- Press the "Reset Icon Position" button.
- The bag icon should now be in the center of your screen.
If that don't work:
- Log out of game. You don't really need to quit it entirely, but you can if you want.
- Go to your per-character saved variables folder: "WoW\wtf\Account\YourWoWAccount\Moonglade\Adrenus\SavedVariables"
- Make a backup of "GHI.lua" file.
- Edit "GHI.lua" with your favourite text editor (you're a programmer so I'm sure I don't have to tell you to not use NotePad).
- Find the array variable "BackpackPos".
- Change both following numbers to something like 100.
- Start the game. The backpack icon should now be near bottom-left corner (about 100 pixels from bottom and left screen edge).
And if that don't work... Well, let me know and we'll try something else.