I'm running IQANDesign 6.02.10 and when using the replace channel function the list gets cutoff at the bottom of the screen with no arrow to move down.
I have the same problem with iQAN 6.04.
If the channel you right click is in the center of the screen it works fine.
If it happens to be at the top of the screen the menu goes outside the top of the screen and vice versa if the channel is at the bottom.
In 6.05 there will be arrows to scroll through the list if it is too long to fit.
Customer support service by UserEcho