After the migration on the new version of quform, I have noticed that the attachments that are being sent via email, are being received as .tmp (usually something like qu1234.tmp), instead of the normal files (example .doc, .pdf etc)
As the forms do not save information in the database or in the server, but only sends the emails immediately, it is quite an urgent situation.
I have tried to use both the simple and the enhanced uploader.
I can confirm that no PHP errors are being produced.
I can confirm that with the older plugin 1.10 everything worked correctly.
System: Windows Server 2012 R2, IIS8 PHP: 7.1 Wordpress: 4.8.3 Quform: 2.0.1