Thanks for the help. It's working now., although it took a sort of virtual "chicken dance" to achieve it. This is what worked: First I set up the include using the File radio button for each of the three extensions that I wanted to remove. While these were still listed, I readded the Includes using the Folders radio button, separately for each extension. The latter action did not visibly change the include list. Only the same three items showed with no changes. But when I ran the Cleaner, the files were removed. So it's functionning now and I know what to try if the next update also disables it. Again thanks: nikki605, nukecad, and Andavari for your help.
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BobJ