Go to the lease tab

There is a icon on the far right, click this icon.

Select tenant, document will show, or upload a lease. 

To upload use the upload button.

To download:

The file name once uploaded in cloud storage will be shown as a "link".

Click on the link and a download will start. 

Note: Version control is managed by server date / time stamp, in seconds.  Every version will be shown with a unique date time stamp