In the folder comparison list, select the column and add another item, the file name without the extension

[cvlot]

In the folder comparison list, select the column and add another item, the file name without the extension.
Why is this attached property's button disabled?

The colors of the files that only exist on the left and the files that only exist on the right are the same. I hope to set the colors separately.

[sdottaka]

In the folder comparison list, select the column and add another item, the file name without the extension.
Why is this attached property's button disabled?

This is probably because you are using the 32-bit version of WinMerge. If you use the 64-bit version, the button should be clickable. However, an item for the file name with extension may not exist.

The colors of the files that only exist on the left and the files that only exist on the right are the same. I hope to set the colors separately.

Unfortunately, it is not possible to set separate colors for them at this time.

[cvlot]

Hopefully the next version will support these features.