Nice tool!!
I have used it to calibrate the stylus, and I run into some problems.
After resetting the current calibration, the DOS command windows opened and I got an error message saying, more or less, that the calibration units were wrong. I changed to the USA regional setting, just in case, but the problems persisted. Rebooting did not help. Then tried again, and instead of closing the configuration panel, a pressed "Aceptar" (= "accept"), and the calibration proceed.
I try to do it in vertical orientation. I read somewhere that the software is aware of the orientation, but it did not work. For me, it only works in landscape. So I put the Surface over a table, rotated it keeping horizontal, and did the calibration.
So far, the calibration seems to work for annotating pdf files.
Thank you very much for such a nice tool.
PD. On my tablet, the fonts are very small. I realized that the it can be resized on the right bottom corner, and it helps making it a bigger. I will be nice having a "full screen" control.