Hi
If you can't find the default folder for audio. Set up one you can find. To set up a folder for your saved audio - Click Options/Disc......and under Captured Audio browse to a suitable location that you know you can find. (e.g. Desktop)
To save the entire timeline not just a selected clip, open the Sequence bin and right click the sequence (usually Sequence 1) Select Save Sequence Audio as a New File. An audio file will be saved in your Options selected location that you set up. (e.g. Desktop) At the same time it will also be placed in the Audio bin as Sequence 1.wav The timeline itself will remain unaltered.
Nat