My best guess would be that the changes audio capture mode makes to your output settings are not reverting when you close/uninstall it. This is NOT normal and is quite odd, but should be easily fixable.
When you use audio capture mode it changes the output settings so that it can capture the audio, but if they remain set this way then there will be no sound from the speakers.
What you will need to do is go to System Preferences > Sound > Output and then make sure it is set to Internal Speakers. Also, make sure under Input it IS set to Soundflower (2ch)
If it is doing what I think it is doing, then it might currently be set to Soundflower (2ch), so change it from that. This is the setting that Jaksta Music Recorder changes to and should switch back when it is closed.
If this resolves your main problem and you would like to further investigate your other issues/crashes, let me know and we can look into it.
From Liam @ 08 Sep 2017 10:09