Sometimes windows do not restore using geOTray and
geOVWM. When you click on the icon, you see the
minimized bar appear next to the geOTray, and then it
disappears back into it. Going back to the window
where you minimized it allows you to restore it.
Right-clicking and choosing 'Maximize' does so as well.
- Nick Reinking (Ranchan @ #geoshell)