[Plugin: Simple Dropbox Upload Form] How to not save on server first

Hello everybody,

I have a problem…
Using the Simple Dropbox Upload Form the visitor of the website can upload a file directly into a dropbox folder. Awesome! But first the plugin creates a file in the /temp/ folder on my server. that is deleted as soon as it is uploaded to the dropbox.

but that is how the file size gets restricted to the server settings. _max_file_size … I need to remove this step.
I want the file to be uploaded to the dropbox right away and not stored anywhere on the server.

Any Ideas ?