Oh well... VRML export from meshlab appears to be broken. And that wrl file is overly
complex anyway - one extremely detailed mesh that just represents a tiny blue sphere
that once must have been the anchor point for switching between the several viewer
positions in the file. (And the molecule itself is a single mesh, not a collection of vrml
"sphere" and "cylinder" primitives that would facilitate changing individual radii...)
Try this one here instead
http://shpws.me/k9gC - i have removed
the unnecessary viewpoints and the selector sphere, and added a scaling transformation
at the top. Just open it in a text editor, find the line that reads "scale 0.5 0.5 0.5" and change
it if necessary. (With this scale, an upload specifying "Inch" as the base unit results in a
model that is 5 by 2.1 by 1.8 in and would cost something like $15 in "full-color sandstone"
or $20 in paint-it-yourself WSF plastic.