Right-clicking it's button in the taskbar and selecting "Move", and then using the arrow keys and/or the mouse. Didn't do anything.
Right-clicking it's button in the taskbar and selecting "Size"... Didn't do anything.
I think I tried reinstalling Flash the first time. (I'm in IT - it was like a personal challenge!) - Didn't do anything.
Reset settings in Flash. Doing this caused my preferences to reset, unfortunately it didn't fix my problem. - Didn't do anything useful.
This time I searched online and found the solution on Experts-Exchange.
"I found this config file and renamed it:
C:\Documents and Settings\%username%\Local Settings\Application Data\Macromedia\Flash 8\en\Configuration\panelset.xml
Flash started again and all windows are visible again. The above file was recreated..."
So I tried the same thing, since I'm using CS3 they changed the name of the file on us, it's now called "workspacelayout.xml" - when I renamed it (to .old) and restarted Flash, I was able to restore my window and it actually showed up!
"Happy! Happy! Joy! Joy! Happy! Happy! Joy! Joy! Happy....."