Alt + Left Arrow Not working

Running 12.8.1 on a few machines. On the newest machine, a clean install of Win 10 x64 1803, this keyboard combination does nothing. It is the only machine running 1803, so the windows version might be the issue. The Customize settings show these commands as present and active, but there is no response.

On the older machines, running Win 10 1709, Alt + Right or Left Arrow works as intended to navigate the folder tree, whether in commander view without a separate folder tree, or in the a view with the tree.

Alt + Left Arrow is working fine on this machine with Windows 10 1803 on it.

It's possible some other program on your machine is eating the hotkey. Maybe something to do with moving/positioning windows on the screen, would be my guess.

Hi Leo. You are correct. After some trial and error, I find that the problem happens only when the program "AcourateConvolver" from Audiovero.de is running. This is an audio processing program that was not causing the same issue on a previous machine. It has no keyboard shortcuts. I will ask the developer whether he has any ideas why there is a conflict.