D2 export drag and drop no longer working in Edge

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In D2 the export 'drag and drop' no longer works in Edge as it had in IE. We have tried it in compatibility mode with D2 and we also turned on the wdk plugin option in the D2 settings.properties file (browser.plugin.activex = true), but no luck.

If anyone has experience with this issue it would be great to hear from you.

Thanks