In order to ensure your data is up-to-date in Dryrun, you will need to refresh your data when you open a Forecast.
Click on Refresh Data at the top right of your Forecast. This will refresh all of your integrations in the Forecast at one time.
Refreshing Your Data in Individual Scenarios
If you want to only refresh a specific integration in a single Scenario, click on the icon for the data you want to refresh (ie. the Xero logo in the Deals Scenario and click on Save & Refresh.