QTR-Quadtone RIP

I have a 2100 (& Win XP) but recently downloaded and installed some 
curves designed for the 4000 just for informational purposes. Once I was 
done looking at these I changed the printing model back to Quad2100 and 
I can once again see my 2100 curves in the dropdown box as normal.

However, when I go into calibration mode inkseparation8.tif 
automatically loads instead of inkseparation7.tif as if qtrgui thinks I 
am using a 4000. It's easy enough to select the correct calibration file 
  and the two files look the same to my eye with the obvious exception 
of the 8th stepscale. However I would like to be sure that qtr does not 
think it is dealing with a 4000 and making any other changes in it's 
behaviour.

Any ideas?

Thanks
Howard