This version includes two asks from the community. It includes the ability to restrict to only allow a single file for upload and also to set the accepted file formats check it out below.
There is now a new property for Accepted Formats this is a Comma Separated String Variable of accepted file formats for upload for example .pdf,.sxls,.jpg. If left null it will default to accept all file formats.
Also added was a property to control single or multiple file uploads. Allow Multiple Files is a boolean property that when set to True allows for multiple file uploads but when set to False will only allow for a single file upload. (The default is false)