Welcome to the forum @Nicky 
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Currently we aren’t able to add our own Shops to the *Shop List. ( *NOT to be confused with adding the name of the “Shop” where an item was purchased from in a Pattern or Fabric record - in those instances you can enter the name of any shop from anywhere in the world 
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However, Doug @TheWizard does have on the Roadmap this 
Be able to add own shops #244
