Format file for work in other software.

Hi, like the title say i just want to request a format file for work in other graphics software and other pixel art software, i love this but the format file are just for this one and if i want to work with asepite for example i just can use jpeg format and are to bad to edit the work... please make one more universal and preserve the editing option, or create the same format file to work in other programs and add it in export option, like PSD option from photshop i can import them in Corel and Gimp!