Changing the app yahoo mail opens attachments with?

[ngt]

Updated yahoo mail and now it opens pdf files with my super Nintendo emulator, which says they aren't rom files and ignores them. So, how do I change the app that opens attachments in yahoo mail on an android phone?

I have a galaxy s5

 

[Sajo]

I think if you go to Settings > Apps > three dot menu > Reset App Preferences that will clear all of the default app selections you have selected. The next time you open a PDF file it will ask if you want to pick a choice to "always open with".