This seems to be a compatibility issues between Qt 5.5.1 and newer versions of Qt, in how a
QVariant storing a
QHash<QString, QVariant> is serialised by
Due to bugs in more recent Qt versions I had downgraded the Qt version used for the snapshots to Qt 5.5.1, but that version seems to not be able to read these particular settings when they were saved by more recent versions of Qt.
I’m afraid your settings are already lost. If you were to set up your commands again while using your current build, at least upcoming snapshots using more recent versions of Qt should be able to read those settings. The next snapshot is probably going to use Qt 5.6.3 (though I’m considering upgrading to Qt 5.9 soon).