Also your checklist

1: CHECK, i used latest download
2: CHECK, clock is fine in right country
3: CHECK, has always been in lowercase when entering it in
4: CHECK, i copied the serial exactly
5: CHECK, i did paste them in the right fields
6: WARNING, i cant access that URl, here is the error when ...

I just made a model and spent about 6 hours working on it. I saved it and closed the application. I came back 1 hour later to open the file and it gives this error. :o

http://i.imgur.com/fkOzBAh.png

Cubik also says it needs updating. When I check update it states it is already updated and ...

I tried it on my Work Computer and my At home computer. It must be an issue with the actual license?

I am having the same issue and I verified everything. Not sure what the last link is supposed to do. I have the latest version because I just re-downloaded it. I can't access the last URL link though.

error 400 - Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko ...