I've got the latest version of AS3 - v3.01c - and, suddenly, it has stopped saving any changes I make to a file.
I've imported the T2300 Near Star List into AS3 and it seemed to be working fine. Some changes made last week seem to have been kept. But, I've been updating the file to add system contents and routes, but all the changes would be lost when next I loaded the file. It doesn't matter if I use Save or Save As.
Also, after several attempts, I noticed that the view title at the top of the window doesn't change when I update a system. I add planets by R-clicking and selecting generate contents - regardless of keep name or not - yet the count does not change.