1.11.5 Right-click configuration always pops up a menu

[Egera]

XnView: MP 1.11.5 64 bit
OS: Windows 64bit

I have had my mouse click configuration set so that right button is next file, left is previous. I think one or two versions ago a menu started to appear when right-clicking as well as going to the next file. That's happening with whatever you configure the right button to do now as far as I can tell.

Effect: A window pops up and block the view of the image.

To reproduce:
1. Configure mouse right click with no modifier to show next file
2. Right click on an image to go to the next one

Actual behaviour (bug): A menu window pops up in addition to going to the next file.

Expected behaviour: Going to the next file, nothing more. I guess the menu should only appear when mouse right click is set to "do nothing".