Hi Rich, the error on upload will happen if the file is too large, like more than 10Mb.

For large files you'll need to use a file sharing service like WeTransfer, Dropbox, OneDrive, etc... where you upload the file there and share a link to it. You can e-mail the link to me at moi@moi3d.com if you want to keep it private.

What operating system are you running on?

If you're on Windows it would probably be a good idea to update your video driver to the latest version from the video card vendor's web site.

- Michael