I have a 6090 machine from WK Laser and I could email you the manuals I received with mine if you think it might help.
Did you receive 2 CD's? If so, if you explore / browse the files that are on them you may find that the manuals are on the driver CD. Probably a .pdf or .doc file.
Also, if you can search through my posts, I posted a video from youtube that shows the setup procedures on a Chinese laser.
Send me a message with your email address if you want the manuals that I have.