Have Leased 3.X and have to renew. Does this work?
 

I currently have a Leased 3.X license. From what I can understand, I do not wish to run 4.0 but under "Upgrade Existing" I can select this:

Upgrade to vBulletin 4.0 Forum $175.00

And I would be able to keep running my current version for another year?