I've faced this problem many times. I created a python addin toolbar and installed it in ArcGIS 10.2 . I work on dual monitors in the office. If accidentally this toolbox is left on the secondary screen and I open my laptop again and disconnect the second screen, I can't see the toolbox, it is hidden or remains on second monitor. I can't find a way to move this toolbox into primary screen. Can any body help me with this weird situation ?
As suggested by @elrobia I think this is all related to your normal.mxt file. Perhaps this guide book on customising your UI will help
If you want to make changes that appear every time you open ArcMap, ArcGlobe, or ArcScene, save them in the Normal template. The customizations saved in the normal template by default are listed below.
- Moving a command item on a built-in toolbar or menu from one location to another
- Adding or removing a command from a built-in toolbar
- Built-in toolbar visibility and position Dockable window visibility and position