The context menu is not the same on Windows 11 Pro compared to Windows 11 Home.

To reproduce it after applying the workaround, you have to fully uninstall WinMerge and then do a reinstall.

On Windows 11 Pro, it's easy to reproduce.

I could NOT reproduce it on Windows 11 Home edition.

I've installed WinMerge on many Windows 10 Home and Windows 10 Pro computers, and I've never had this issue occur before.

I believe this issue is unique to Windows 11 Pro.

The context menu if selected during setup, should get configured without having to go through extra steps to fix it.

On the Options window, Click OK, to close the window.

Clicked on Register shell extension for Windows 11.

I listed the above steps to show how much work users may go through before getting the advance context menu option working.

Advance WinMerge context menu option listed.

WinMerge listed in context menu option.

After performing previous step, Click OK on Options window, to close it.

Selected Enable advanced menu option, clicked on Unregister shell extension, and clicked on Register shell extension for Windows 11.

Selected Enable advanced menu option, and clicked on Register shell extension for Windows 11.

Enable advanced menu option available for selection.

WinMerge listed in context menu option (by itself).

Enable advanced menu option greyed out.

Explorer did NOT display a WinMerge context menu.

Before clicking this button, the 'Enable advanced menu' option was greyed out, and could not be selected. I performed the following steps before getting it right.

Originally posted by in #1152 (reply in thread) Fixing it wasn't straight forward, even with the available options. I found the following post, which help me fix the issue.

After installing WinMerge on Windows 11 Pro installation, WinMerge did not appear in Windows File Explorer context menu.

Winmerge windows 10