Find a package that has sounds in it. Load the package fully. Save the package. Did UDK crash? It is crashing 100% of the time for me when I try doing that. I don’t think I did anything that should have caused that. But last night my computer ran some big Windows 10 update (edit: it was the Windows 10 Creators update) and today I can’t load my sounds. Wondering if anyone else is having this problem and if so, if you’ve found a solution yet. I’m going to keep working on this.
Edit: Just a suggestion. If you haven’t installed the Creators update, don’t do it.
Edit 2: Actually, it looks like I can’t save any packages now. Totally broken. Practically useless. I’m going to have to try rolling back the update. I’ll let you know what happens.
Update: Rolled back the update, and everything seems to be working again. Yeah. Do not install the Windows 10 Creators update.