I use Poser 6 on a Mac and it has recently begun to act oddly.  At the top of the document window in the preview mode, the Figure and Parts arrows no longer work for selection.  No amount of clicking on them makes the slightest difference.  If I click on the actual figure, they change text but still are static.  The same thing for the parameter dial arrow and in the material room.  How do I fix this?  Do I need to reload the software?  Can that be done without losing all the stuff I have downloaded?  Does anyone have an idea WHY this happened so I can avoid future problems (assuming this can be fixed). I've included my computer specs and will admit my Poser file is currently 5.5 G. What can I say, I'm a shopaholic.  Hopefully someone has some helpful hints.  Thanks.

  Machine Name:    eMac
  Machine Model:    PowerMac6,4
  CPU Type:    PowerPC G4  (1.2)
  Number Of CPUs:    1
  CPU Speed:    1.42 GHz
  L2 Cache (per CPU):    512 KB
  Memory:    2 GB
  Bus Speed:    167 MHz