Geeetech

Hi,
instead of frickling the SD Card in and out I would like to use the USB Connection, with a Computer as print host.
Like every other Printer from Geeetech supports it.
Using repetier host, I could start printing but te print crashes after a minute or so.
Using simplify3D I can connect, but can't send any command.
So I have a couple of questions:
So what would be the correct Setting for the Serial communication over USB?
What is the latest Firmware? I have 1.00.14
How to upgrade the Firmware?

Thanks
new robot

The latest firmware has fixed this bug

OK,
I updated to Firmware Version V1.13.16 but the Connection still crashes while printing.
But instead getting better it got worse!
Formerly i could print from sd Card, now I even can't print from this one anymore!
starting printing the Printer pauses and does nothing at all.
Are there some more informations about the usb Connection?
Update
OK it got better after disabling handshake but it still crashes.
Te Printer itself says Firmware Version V1.13.16
When I use Software to read Firmware Version it still says V1.00.16
What is correct?

Could you upload some pics of the errors to google drive?