As a work around NCH have software called Switch which is a file converter. If like me you can save as wav files this is a work around even if more time consuming!
Same issue here. Saved 100s of mp3s in the past. Now when trying to save it shows the progress bar, makes no progress and exits the save routine leaving the unsaved file on screen. Can save as wav etc with no issues. Upgraded to latest version and no joy.