I am using the latest off Github. I finally got this ‘inventory side window’ working, and posted code on a different topic: Creating an inventory window - #4 by allensocket
As a request, what I think the community really needs is a complex example. The opening of “Dead Cities” ifdb.tads.org/viewgame?id=q5el4dphbf7q6e5y is really the kind of sample I wish was maintained with source code that compiles on latest Inform 7. It has 4 windows: One upper right with graphic image, one bottom right with Inventory, one on the bottom with helps and tips (including hyperlinks), and finally the main window.
I haven’t found any source code that compiles that demonstrates this kind of complexity. My research keeps landing on these very simple example topics.