(1). download the application with UCweb or your PC,so that you will be able to rename (.jar) to (_ jar)

(2). Rename the application to (.zip) with blue ftp.

(3).With blueftp Open the zip file press option => select all => option => extract to a folder.

(4).In the folder you have extracted,you will find all the files contained in the application.now u can remove the ones you want and replace it with the ones you like

(5).note:you have to rename the new one exactly as the old one. E.g "picture.png" should be "picture.png" and not "picture.jpg"

(6).In the folder you have edited press option => select all => option => compress items with (jar)