On export of an aggregation pipeline the filename of a csv for example is the filename of the last exported document. this makes sense if its the same aggregation pipeline or the same export.
When i change the pipeline it would be great to automatically (at least when the pipleine is saved as js file) to take this filename and append it with csv.
It happened to me multiple times that i export and overwrite the file that i previously exported.
also another mechanism to prevent this might help (blank filename instead of the last used one).