Upon review this does not appear to be something I'm able to action. The shipping system in eCommerce being as variable as it is, does not lend itself to creating useful structured data.
Group icons and banners are in the importer, and I explicitly tested this, so those steps must not have been selected during the initial import.
There is no way to recover them.
If the images were not already sorted into albums that can be easily linked, then no.
If Nobita's groups did not utilise albums but rather stored the permissions on a per-image basis, that could also be a possible explanation as to why there is no importer.
I can confirm that there is no support for importing XFMG items when importing from that group system as I was not aware of it and/or the version I used for import testing did not have the feature 😅
The reason why the category(ies) are greyed out is the fact that only "Album" type categories...
It's there:
Likely this is related to the membership issue from your previous tickets, as that is one of the factors that determines whether the tab is shown.
I'll release the new version after the new years is over :)
Notes to self:
Defined globally in the AdminCP
Must be impossible to delete used fields - return an error message when attempting to delete fields that have been used in an address. Find out what happens when new fields are added, does the "field value" table receive empty rows?
Redesign...