In Oracle SQL Developer when you right click into a query result and select export it brings up the Export Wizard.
After selecting the format you want (in this case .xls) the default save as target is (for me)C:\Documents and Settings\XXXXX\export.xls
What i would like is to change the default output file name from always being export
to something that is dynamic, a timestamp perhaps?
I would even be happy to implement a 3rd part extension to handle this.
As discovered this is not currently possible but is currently down as a feature request with Oracle to be implemented if it gets enough attention from users.
Feature request:
https://apex.oracle.com/pls/apex/f?p=43135:7:114031166834052::NO:RP,7:P7_ID:41561