Keep track of export location/filename

I keep my .pyxel source files in a different directory than the tileset .png files, and it'd be very, very convenient and time-saving to have Pyxel Edit keep track of where I last exported, so that I don't have to browse each time I want to export the tileset.
Keep up the great work, by the way; Pyxel Edit is a really great product. 

Comments
Should this be saved with the document or should it default to the document location when you close and open it again? It feels a bit weird to have state like this stored in the document, for example when putting it in version control or moving it to a different computer, so maybe it should only be remembered during the session and default to the document directory?