How do I size the windows in LimeWire Pro 2.5.5?

It seems to me that I was able to do so when I first installed it. Now, if my main LW window isn't at full-screen, then all of the other window (Options, etc.) are cut off vertically. (Just to clarify, I DO know how to resize the windows, it's just that the resize widget in the lower right isn't there... and right-clicking while holding down the Alt key isn't working.)

This is using Fluxbox, incidently - I haven't tried it with any other WMs/Environments since I only have TWM and Fluxbox installed at the moment.