Delete Texture In Particle Emitter

We noticed that when we put in a particle in the texture section of particle emitter we can't seem to delete it Any way to delete the unwanted texture in particle emitter as it's taking up too much file size.

Also how do we setup objects to appear in the section of sprite editor in the particle emitter?

@ZackGriset ... anyone? Thanks in advance

 

Anyone able to help?

 

Close BB.
Make a backup copy of your file.
Rename your bbdoc to ZIP file, open it with WinRAR or WinZIP, look in the "images" and "effects" folders for the image you want to erase, delete it, close the compressor.
Rename the file to bbdoc and open it with BB.
Check if it has been deleted.

 

@jcalle .... Thanks a whole lot mate! Works a like a miracle