Help: PNG files not being replaced [FIXED]

I’m in the runtime for Codea, and I just replaced my PNG files with PDFs but the app’s still showing the PNG files. I’ve moved the PNG files to the trash and cleaned the project, but there still isn’t any results. I had done the same process earlier with the same steps and succeeded, but I can’t seem to do it this time.
Any help would be great.

Update: Strange… If I uninstall the app, that fixes it. Whatever.