Load JSON
This will overwrite saved labels. Please export before opening a new file.
Format: [{"barcode":string,"name":string,"price": number, "lastPrice": number, "qbName": string, "qbAccount": string, "noPrint": boolean, "salesTaxCode": string, "purchaseTaxCode": string, "cost": number, "COGSAccount": string}]. lastPrice is optional, but nice for Verify Labels.
	noPrint
	is optional and defaults to false, and is used to hide labels.
	qbAccount
	and qbName fields are needed for Export to Quickbooks CSV
	but are otherwise optional. cost, COGSAccount,
	salesTaxCode, and purchaseTaxCode are all required to create new items
	using Export to Quickbooks CSV. Extra fields are fine.