I’ll assume you “Fix Up Redirectors” already. Atm, I can only think of two other things you could try. A) Use a low-level search tool, like “grep -a” to search in all files, including binaries, for the name “WwiseAudio”. Maybe there is some reference to it from some place where you don’t expect … B) Create a new empty project, and try to migrate “all your content” to it, except for that directory. That sounds overkill, but I can’t really think of anything better to try. I’ll have to note that I only used BP until now, so if this is a problem related to C++ code, I wouldn’t know how to solve it.