I have upgraded to vray 3.3 yesterday and everything looked fine. Renered a few scenes and it was ok. After one hour I got the error 200 no license found. After that time I was unable to render again. reinstalled but and checked WIBU and I get all kinds of errors (wibuke64: fatal error WK1204 - WibuBox with bad version.). It can’t find my Wibu but the vray installer can somehow. Any way to fix this soon???
Try another usb port. And of course reinstall everything 
Thx for your answer! Tried a different USB port and reinstalled 3 times but did not work. Unsinstalled everything an tried a different dongle fron a buddy of mine and it worked on 3.2 Tried my dongle a his place. Did not work.
Nothing gets written to the dongle with an update form 3.2 to 3.3. Something else must have gone wrong.
download and reinstall the wibu drivers from the website
I get error -200 after a fresh install because my license server isn’t started yet sometimes. If you got into programs->Chaosgroup->Vray->Licensing and start it up, does it work?
Yes I get that as well, I am used to start it manually as autostart somehow did not work on my system.
Will try this out, TNX! Is it the WibuBox /U+ or the WibuBox /RU+?
You are probably right.
After a complete removal of the wibu drivers and installing the windows 10 versions from their site its working again!! Tnx all!!