I'm pretty sure you might have found a solution by now but in case you're still looking for a better alternative, you can try Automate.io.
Their drag and drop interface makes it super easy to connect various apps. I currently use it to connect my Shopify store with Quickbooks and MailChimp,
Here's a link to their Quickbooks Integration: https://automate.io/integration/quickbooks/shopify
Hope this helps.
QuickBooks and Shopify sync beautifully.
You can automatically import all of your orders and refunds from Shopify to QuickBooks.
Hi are you looking for a pre-built solution or want to create a connector?
If you want to deploy a pre-built solution with bi-directional sync, you can try DBSync's Shopify QuickBooks Connector.
More information with resources can be found here; Shopify Quickbooks Integration
Hope it helps.