Windows released a security update on the 9th August which means that cookies are no longer stored in the usual <username>@<service>.txt, but are now a random set of 8 alphanumeric characters, e.g. A1B2C3D4.txt. It seems this has broken a lot of software, especially those than delete cookies as they probably rely on the fact that cookies had a very conventional naming method. Old cookies stay the same as you can see from the below screen shot of my cookies folder.
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