Sorry but because of my severe depression and heavy medication I can not do anything like this.
I am ready to drop the whole thing unless someone can quite literally give a click by click list of instructions that a seriously impaired dead head can follow.
Having said that refering to your image of the screen shot in the lower block there are the words -
"Apply this rule after the message arrives"
"assigned to any catagory"
"clear message's catagories"
Then underneath there is an unticked box and the words "Enable rules on all messages downloaded from RSS feed"
Sorry I can not do more.
Unless you have been where I am you will have no idea about what I am struggling with.