This is a single issue and you can probably fix it already from your side.
The whole system with sensor scale is working based on a simple text file stored on the application settings folder.
1) Where is this folder ?
windows : open the explorer and enter %appdata%, you'll get to a folder. Depending on the OS (Xp -> W8), it could look like "c:/Users/yourname/AppData/Roaming".
You need to go up one level and go to local / Kolor / Autopano Giga 3.0 for example . See the attached screenshot.
Mac : /Users/USERNAME/Library/Application Support/
Linux : on the user home / .config ( If I remember well ... )
2) In Kolor folder
There is 2 folders, the default value that are provided by Kolor ( folder Kolor ). As soon as you update a software this folder will be overwritten.
The User folder. You can copy one of the settings from Kolor subfolder and put it in the User folder ( conserving the relative folders and naming ). Then you can overwrite several settings ( If you want to have your own icons sets, this is the way to do ).
3) Lens / Cameras settings.
This is stored in Kolor / Data / Cameras.txt settings.
The case you have seems to comes from EXIF issue.
Look into the cameras.txt
It does say that first, we should fit the exif Model with "EOS-1D X" ( with a space ).
Then 1DC, etc. Until 1D. If the software found out ID and not "1D X" it is probably because inside the EXIF of your file, it is not written as that.
"extract from cameras.txt "