It's not really related to the taskbar, so it's unlikely to be implemented by 7+ Taskbar Tweaker.

That's already possible with the Mouse Button Control advanced options. Refer to the help file, and let me know if you need help with it.

Please provide more details. Are you seeing any error message?

What is your version of 7+ Taskbar Tweaker? Also, are you seeing any error messages?

Check out 7+ Taskbar Tweaker v5.3.0.1 beta.

Maybe it was a temporary Windows issue. I'll close the bug for now, let me know if it comes back.

Since it's not a bug of 7+ Taskbar Tweaker, I'm closing this issue. Let me know if you find out that it's something to do with the tweaker.

I hoped for some information such as the Windows version or maybe conflicting software. The tray icon hiding functionality haven't changed for years in the tweaker, and I haven't had problems with it. Basically, it uses the documented NIS_HIDDEN flag to hide the icon, so I don't see a reason for it to misfunction.

I have verified, and it works on my computer. Do you have a way for me to reproduce the issue?