I downloaded a save file (the one posted on 16 Sept) from this thread to look at how other players do things but that particular save cannot be deleted afterwards for some unknown reason. Nothing happens when I click the delete button in the save/load menu.
I also downloaded 2 saves from another thread which I was able to delete without any problem.
I tried to delete it from the local save folder but steam cloud sync will simply re-download that undelete-able save to my local save folder whenever I run Big Pharma.
Renaming that save file in the local save folder will create another undelete-able save.
The only solution I can come up with so far is to delete the local save file and disable steam cloud sync.
Not sure what is causing that save to be “immune” to delete, so I am reporting it here as a potential bug.