Had to remove a 3rd monitor as the power supply went and now unfortunately I cannot access Fibery since it’s remembering a window position that isn’t accessible.
I’ve restarted Windows, and Fibery, and no luck, it still opens somewhere I cannot reach.
Try using ALT TAB to focus the invisible window, then ALT RIGHT to make it fill the right side of the screen, then you should be able to drag its title bar to reset its normalized position.
For anyone landing here, a Fibery user said they solved it as follows:
I was just able to fix this- I searched up a hotkey for moving apps in Win 11, it's Alt-Space-M.
With Fibery selected I could hold down the left arrow key after that to bring it back into view.