How to download multiple documents from an InfoPath library using Open with Explorer button?

Hi there

Though I can download documents one by one - but when I go to my InfoPath Library > Open with Explorer (to download multiple documents), I get this error.

Any idea on how do I get around this? (I have full permissions as site collection admin and farm admin both).

Please note: I already tried regedit to increase WebDAV limit and it still did not work https://support.microsoft.com/en-us/help/912152/you-cannot-access-a-webdav-web-folder-from-a-windows-based-client-comp 

Thanks.