This is a common issue that will occur anytime an update to a newer version of QuickBooks is performed. With each update, customers will need to pair the QuickBooks Web Connector again.
In the case of QuickBooks Point of Sale, you will always need to then fully remove the latest version of the Web Connector and reinstall version 2.1.0.30. Performing this operation required internal IT and is beyond the scope of our support.
Settings within Connex are unaffected by this.
IMPORTANT: As of April 2019, we no longer support integration with QuickBooks POS. Use of this product is “as is,” as this integration is deprecated.