Couldn't open project: Unknown kind in savefile: direction

I see that lots of changes happened, that's awesome !

However I can't open my saved projects. When I click on them I get a popup that says `Couldn't open project: Unknown kind in savefile: direction`.
Hopefully it's an easy one to fix, otherwise I can recreate the various projects.

Thanks,

Look for the save/load code handling project files, likely in a module like `src/save_load.rs`. The error mentions 'direction' as an unknown kind, so check the serialization format (maybe serde) and how enum variants like 'Direction' are tagged. Compare the current code against older saved files to see what changed. Running the project and trying to load a saved file with debugging will show where the parse fails.

Written by the indexing model from the issue text.