UPDATE 26.08.2019: Export Wizard will still offer direct download in version 19.1, but in addition send an email when completed. It is the users choice whether to close the GUI and wait for the email. 19.2 will allow a larger data-set to be exported and the direct download function as is today will be re-evaluated.
Starting from WATS server release 2019.1, the Export Wizard will no longer support direct download of the exported file from the browser. Instead, the exported file will be made available to download from a link sent in an email when the export is completed.
The Export Wizard will also require WATS to be configured with an email server (On Prem) and the user requesting the export must have a valid email address associated with their account.