Same problems here, very fast download speed, suddenly stops and slows down between 0 and 3kbs.
Barcelona, Spain
ISP provider: Movistar 1Gb fiber.
It doesn't depend on what time it is.
Any Orbx product I have purchased
When I cancel the download it seems that Orbx central stops responding or takes a long time, I have to close the application and when I run it again, the download finish.
Where can i find a log file for you?
Regards