How to remove 1000 URL added to the "Always block these URLs" list?

Hi

I am testing a Gateway 120. 

I added ~1000 URLs to the "Always block these URLs/sites" list under the URL filtering. I did that through the import function. 

One big problem: I was meant to import these to the "Additional URLs/sites to allow" list... 

So now I need to delete these 1000 urls. How do I do that?

Another question would be: In the future how can I manage this long list other than with the web interface.

Thanks 

Alexandre

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