Hello Maurice,
If you connect the EV3 to your computer with an USB cable you need to be able to ping the address 10.0.1.1, and in order to connect the EV3 with WinSCP over USB you need to use the following settings:
File protocol: SCP
Host name: 10.0.1.1
Port number: 22
User name: root
Password: (leave empty)
Then you’ll be asked again to enter the password, just ignore it. Then an error will appear, just ignore it. Then it will work 
You need to copy your programs in the folder ‘apps’ (/home/root/apps).
Hope this helps.