QTR-Quadtone RIP

Hi Folks,

I apologize if this post seems a little behind the curve. I started using QTR with v2.3.1, 
spent a lot of time creating custom profiles, and have been very happy to stick there and 
get great results for some time now.

Until yesterday.

I moved my primary imaging system from a PowerPC-based G5 to an Intel-based Mac Pro. 
Now I cannot access the QTR pane in the Mac OS X (10.4.10, fully up-to-date) print dialog. 
I'm dead. (Or I need to relegate my old machine to nothing but a life support printing 
system...)

I have scrubbed through the ReadMe files for all versions of QTR since 2.3.1 on the QTR 
web site, and also looked through the most recent version of the Tutorial PDF that is there, 
and I see nothing about QTR being updated in any version since 2.3.1 to support Intel-
based Mac OS X platforms (or more recent versions of the Mac OS Print dialog).

Yet, I can clearly see from some of the most recent posts that some of you are using QTR 
with Mac Pro machines.

Can someone please tell me what version of QTR introduced support for Intel Macs? I know 
I should probably upgrade to the current version if I am going to upgrade at all, but I do 
have one very real concern, and that is that I would very much prefer to keep my existing 
curve data and custom ICC profiles -- I spent a great deal of time and effort getting these 
right, and I really do not want to throw that work away and start over from scratch. If I can 
upgrade to an available version that allows me to keep my 2.3.1-based curves & ICC 
profiles, and gain full function of QTR on the Mac Pro 10.4.10 platform, that would be 
ideal.

Thanks in advance,
/eddie