I just noticed another .class parsing error while copying
from <http://www.age-eraser.net/> after downloading the latest
WinHTTrack 3.23 (+swf) version.

WinHTTrack Version 2.3 parsed correctly and downloaded both
.class files
fphover.class and fphoverx.class.
The fphoverx.class is linked from inside the fphover.class
at the line
        fphoverx fphoverx1 = new fphoverx(j, k, color, i);

WinHTTrack 3.23 does not parse the fphover.class correctly
and does not download the fphoverx.class.