XCacls.exe to remove the "Modify" permission from a folder for the "Users group

Hello everyone.
I just can't figure this one out and would greatly appreciate any help I can get.

Here's the deal.
I have a folder (Folder A) within the Program Files folder, that inherits permissions from the PF folder. ("Read & Execute", "List Folder Contents" and "Read".)
And life is grand.

I installed an application that added the "Modify" permission to Folder A.
And still everything is great.

Now, when I uninstall the aforementioned application, Folder A retains the "Modify" permission.

My goal, is to use XCacls to remove the "Modify" permission from Folder A so that the permission for the Users group are what they were before I installed the above application.

I can't seems to figure out how to accomplish my goal.
Not to shine light on my short comings, but I have spent some hours trying various combinations of parameters and still can't get the job done.

Any possibility that someone might have some advice for me ?
Maybe even an example of what worked for someone, if they have managed to do the "above" would be wonderful.

Im completely lost at this point and sure could use a little light.

Thanks in advance for all replies.

Ray in Wisconsin