Aloha ;)
Hopefully this is the correct approach, otherwise please forgive this poor newbie.
I often use two physical screens in windows 8 (my laptop screen #1 and a office stationary screen #2) - when HeidiSQL has been opened on my "office stationary screen" the help window will not display on my primary laptop screen when i get back home. However when i reconnect my laptop to the "office screen" HeidiSQL will display on my laptop screen and the help window will re-appear on the office screen.
No biggie, but clearly a bug.
...And: great work you guys - thx!