spriteList not listing PDF file

I made some code to draw images from my Dropbox folder; I added a PDF file to the Dropbox; Synced in codea. the PDF appears in the sprite pack but it is not listed when I call spritelist( “Dropbox” ) but the other png files are. I am able to draw the PDF in sprite() By selecting it in the pop up. The name of the pdf file does not clash with another file.

Sorry, I have no idea how to check what version I am running.

P.S.
Amazing app!!!

Thanks for the bug report, @rpattiso. Good find! This will be fixed after version 1.5.1 (you probably have version 1.5).