I think this is already fixed for the next build, as per the other thread.
(BTW, this is why we wrote a warning on the r100 release page about ensuring you have backups set up. Set up backups now if you haven't already!)
The problem seems to be related to C2 forgets where the standard folders are located. Ex. when I try to import a png. it doesn't remember the last place I used for that etc.
So it seems to be related to remembering where all the "stuff" is located when creating a new save location / save as.
Hope this will help finding a solution.