I think the problem is not with putty in that case but with
top. I don't know if you have any other app with issues, in the case of
top you can move the display to the right/left with the keyboard arrows, this should allow you to view the full command path. But...
You might want to use other settings too, as doing
top -c will show the full path for the process, and it will still refresh every second or so, and you will have every process changing position all the time. Not good.
So, I prefer to run
ps auxww instead, if you need
top, you could wrap a 1 second capture of
top -cbn1 -w256, that would set the
-b for batch, the
-c for command and the
-n1 for iterations while the wrap for 256 width.