This is something strange. When I press the forward navigation button, the Help box opens.
Forgot to add:
Directory Opus Pro 12.2.4 (Beta) Build 6141 x64
OS 10.0 (B:14393 P:2 T:1) SP 0.0
Thanks, there is something wrong with the code behind button. See 'Function' in screenshot below. However, the drop down does not show 'Standard Function' as per your screenshot.
Click Advanced to see that.
It looks l like the custom toolbar just has the wrong command on that button.