What happens if I uninstall and reconnect?

Uninstalling the app in Shopify stops the sync and revokes our access token. Your data in nouz stays where it is: the orders already synced, and every cost rule you entered, which is the part that took you real work.

Reconnecting picks up from where the sync stopped and fills the gap. Your cost rules are still effective-dated as they were, so the orders that arrive in the catch-up are priced with the rules that were true on their own dates rather than with today's.