If you were used to use the button "I've already checked these" on the newest nodes page, you will only get those newest nodes, since you pressed that button last time. So, there are a lot of nodes you havent seen yet. So the only way seems to make the server not to timeout the request while sending you the 260K file :-).
But I don't know if
vroom has preserved a way for unchecking in any other way such as an option under your homenode where u set your preferences.
Have a nice day
All decision is left to your taste