ID 505464 - Config Export does not save all changes made in the preferences.

Problem summary
Config Export does not save all changes made in the preferences.
 
Customer reported version
modo.15.2v3
 
Customer reported platform
windows10
 
Steps to reproduce
 
1 ) Launch Modo. 

2 ) Go to System > Preferences > File I/O > PBR Defaults.

3 ) Change the enabled options.
 
4 ) Go to File > Config Export.
 
5 ) Name the export as desired and save to an easy to find location.
 
6 ) When prompted choose the fragment to be Preferences and click OK.
 
7 ) Close Modo. 
 
8 ) Go to C:/Users/{userfolder}/App Data/ and delete the Luxology Folder. 
 
9 ) Re-launch Modo.
 
10 ) Go to File > Config Import then choose the config fragment you have just created.
 
11 ) Go to System > Preferences > File I/O > PBR Defaults and note that the changes did not carry over as expected.
 
Expected behaviour
All preference changes should be exported with the config fragment.
 
Actual behaviour
Not all changes are exported.
 
Workaround
Unknown.
 
Reproduced by support
 
This bug has been reproduced in:
15.2v3 - Windows 10
15.1v1 - Windows 10
15.0v1 - Windows 10
14.2v1 - Windows 10
14.1v1 - Windows 10 
 
 
Unable to reproduce bug in:
 14.0v2 - Windows
 
Earliest version tested
14.0v2 - This feature did not exist before this version