On the version mismatch: the Microsoft Store may lag behind the direct download, so it's worth checking the official site's release notes rather than trusting Store updates alone. If 1.135 is what you're actually running, confirm whether the custom-sound fix from 1.1.60 carried forward, because that's the part that trips people up. On the "Sound maker" search that never finishes, a Store reinstall sometimes leaves cached app data behind; clearing that folder might be what's blocking the load. For the WAV, re-export in Audacity with metadata fields blank and verify it's mono, since stereo 8-bit files often fail silently.