Easily done with NCH Wavepad.
In VP right-click an audio clip on the timeline and save it as an audio file. Open that file in Wavepad and do your thing.
Back in VP, right-click the clip and UNLINK (if necessary), CUT the unwanted audio clip, use ADD FILE to import the corrected clip to the media area and then drop it into the hole on the timeline.
If you need to tweak the entire production, EXPORT it as a video file. Right-click that file and one menu choice should be EDIT WITH WAVEPAD. Or use OPEN WITH to direct the file to Wavepad.
If specific audio clips are needed, select them and press <ctrl-C>. Open a new sequence. Press <ctrl-V>. As above, save as an audio file or export as a video file. Process with Wavepad.