In the process of working on the Mariage site, I discovered that changes to the executable InternalName for the installer had caused the app to stop detecting when it was opening a version 1.3 file, so it was not doing conversions from 1.3 to 1.4. Did a quick bugfix, and (thanks to the new installer setup) built a new installer without having to change anything. Updated the site, and tested the installer while updating IMT on Endive and Chicory.