Hi,
I thought I'd try this and found it worked fine: relationships saved and I was able to see them - I'm in MX Linux KDE right now, but will be moving to either Mint or KDE Neon or perhaps even staying in MX.
I struggled initially to find the relationships list, but under Tables| Secondary Objects, I was able to see it. There is also a little button on the right-hand side of the character window, once you've created the relationship for the character, which I think is rather neat.
I did find that initially, creating an object and a location and then saving and closing oStorybook resulted in the oStorybook layout - the tree on the left, other windows on the right - getting scrambled on relaunching the application. But once I got that sorted, all was well. I also found that the columns for the relationships tab/window always revert to the default setting which is only a few characters wide. Grrr.
I agree with you: there's a lot of promise to this application. I think everyone involved is doing sensational work. Somewhere I found favdb's full name but for the life of me, I can't find it again.
Michael P.