R-Wipe & Clean doesn't clean up junk left by the MS Store Skype app.
The traces were found inside AppData\Local\Packages.
Skype for Store
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Discussion on the R-Wipe & Clean and R-Crypto software
Discussion on the R-Wipe & Clean and R-Crypto software
Re: Skype for Store
Thank you for reporting! I've passed it to our developers.