Cannot upload file if marked Read Only

Apr 20, 2016 at 6:15 PM
I found today an annoying problem where I get the following access denial message when uploading a file into SP2013.
System.UnauthorizedAccessException: Access to the path '<PATH\FILE>' is denied.
After some testing, I noticed that this had to do with the Read Only property that is tied to the file located in the local computer. When this property is enabled, this error will arise but when disabled, then SPFileZilla will upload normally.

Click & Dragging the file from explorer to the "Drop Here" area will upload the file no matter what this property is set to. Can this behavior at all be changed or is there something that can be added to the config file to ignore the read-only property?