Unable to read data from Goldleaf NSP exports

[Eds1989]

I've just started backing up some of my games to NSPs using Goldleaf.
Trying to use SBM to manage them and the files, but it doesn't seem to be able to read any of the game data such as images, titles, versions, FW requirements etc.

Is it likely an issue with the way GL exports the NSP, or how SBM reads the data? The log doesn't say much other than not being able to determine game title.
Is there perhaps another way I should be exporting to NSP?