This may be an irrelevant tangent, but just to clarify since I see both terms used, are you making a custom limit here, or a linearization?
Did you mean trying to limit, rather than linearize, the master quad?
If it is a linearization, why are you using the Curve Adjustment tool rather than the Smoother?
I’m not sure about Windows, so it might be different, but on Mac the -out.txt file and the new -lin.quad are created in the same folder as the original quad and text files from which they were made. It’s kinda odd that you got an -out file where expected and a new quad in some mystery location. Could that be something peculiar to Windows?
About the -out files, QTR-Linearize-Quad always creates those. (I think QTR-Create-ICC does too, but it’s been a while since I used that so I’m not sure.) Normally these can just be deleted, but if something goes wrong they often hold a clue to what the problem might be. That clue will usually be found at the end of the file.
Or have I completely misunderstood the situation?