SL1 file into 360 - Story view, but no content on actual slides
I have an SL1 file that I'm trying to edit in SL 360. I've tried simply opening the file in 360 and also importing. Opening straight into 360 displays all the content in the slides from the Story View, but when I go into any of the slides there's no content, just blank an no actions.
When I import the file into a new blank project I get the first slide showing content on Story View, but none of the others are. However, when I go to edit any of the slides, I can see that something is meant to be there as some of the slides have unassigned triggers.
I was sent the file via email and all I have is the SL file, no media content or folders etc.
I know with SL 360 it seems to embed all content into the project file as I've had projects sent to me like this before and they've worked fine (SL360 projects). Did SL1 not embed the media content perhaps and so the project file needs to be exported perhaps and edited that way?
I've seen other threads stated that they've worked around it by opening in SL2 and then saving and opening in SL360. I don't have SL2 and won't be able go down that route. Are there any other solutions to this?
Any advice appreciated, thanks.