Hi,
Good to be in flu at home so I can work on some things I would otherwise find time to…
“StEwert.con” has contributed some improvements for the add-on and they are now included in version 0.5.2. From that very same version I forked a V7 compatible version that I published with version 7.0.0. The V7 branch also has client side file type and size filter that works on html5 capable browser. Currently only as Upload extension and a API in UploadField. Don’t solely rely on these features in your actual application code, but they might help end users a bit.
I hope it works for you!
cheers,
matti