Fixture Window is missing

[Leeo]

We are a nightclub and there are about 10 LJ's so i don't know exactly since when it so:
As i updated from feb 20 to the august version i noticed that the fixture window in our huge SS2 show doesn't show up when i press the button in the bar (the button is backlit but nothing happens even if I close all other windows) (i even checked all favorits for the different window positioning data from the different LJs...)

When i create a new show everything works fine!

This Sunlite show was created with sunlite suite 1 then converted to SS2 and updated thru all the versions since 2010...
This show is really huge... We spent years of programming scenes and makros ;-)

I tried to reopen that show in older versions but the window remains missing.
So i think the bug is in that show file! what can i do?

Thanks

P.S: thrue this failure i also noticed that someone deleted all my show file backups :-(((

[simonB]

If the icon is highlighted, the window is definitely open somewhere. I've seen the window info get corrupt in some cases and appear as a very tiny 2x2 or 4x4 pixel square in the top left of the screen, have a look there